{"id":430,"date":"2026-04-28T10:52:00","date_gmt":"2026-04-28T14:52:00","guid":{"rendered":"\/blog\/?p=430"},"modified":"2026-05-10T00:48:33","modified_gmt":"2026-05-10T04:48:33","slug":"kw-to-hp-european-engine-specs","status":"publish","type":"post","link":"\/blog\/kw-to-hp-european-engine-specs","title":{"rendered":"KW to HP for Cars: Reading European Engine Power Specs (BMW, Mercedes, Volvo)"},"content":{"rendered":"\n<p>A BMW M340i spec sheet says <strong>285 kW<\/strong>. The US version of the same car is sold as a <strong>382 HP<\/strong> vehicle. Same engine. Different units. If you\u2019re shopping for a European or import car, comparing across markets, or just trying to figure out what \u201ckW\u201d means on your friend\u2019s new EV, this guide gives you the formula, a model table for popular cars, and the surprisingly subtle difference between three kinds of \u201chorsepower\u201d still in use.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Jump to a section<\/h2>\n\n\n\n<ul class=\"wp-block-list\"><li><a href=\"#formula\">The formula<\/a><\/li><li><a href=\"#three-types\">Three kinds of horsepower (and which one matters)<\/a><\/li><li><a href=\"#model-table\">Model-by-model spec table for popular cars<\/a><\/li><li><a href=\"#table\">Quick reference table<\/a><\/li><li><a href=\"#why-kw\">Why European catalogs use kW<\/a><\/li><li><a href=\"#faq\">FAQ<\/a><\/li><\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"formula\">The formula<\/h2>\n\n\n\n<p>Worked: <strong>285 kW \u00d7 1.34102 = 382.2 HP<\/strong> (the BMW M340i value). The conversion is exact for <strong>mechanical (imperial) horsepower<\/strong> \u2014 the standard used in US automotive specs. xconvert\u2019s <a href=\"https:\/\/www.xconvert.com\/unit-converter\/kilowatts-to-horsepower-(british)\">KW to HP converter<\/a> handles the math at full precision.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1600\" height=\"1222\" src=\"\/blog\/wp-content\/uploads\/2026\/05\/step-01-converter-9.png\" alt=\"KW to HP unit converter with formula and example conversions\" class=\"wp-image-503\" srcset=\"\/blog\/wp-content\/uploads\/2026\/05\/step-01-converter-9.png 1600w, \/blog\/wp-content\/uploads\/2026\/05\/step-01-converter-9-300x229.png 300w, \/blog\/wp-content\/uploads\/2026\/05\/step-01-converter-9-1024x782.png 1024w, \/blog\/wp-content\/uploads\/2026\/05\/step-01-converter-9-768x587.png 768w, \/blog\/wp-content\/uploads\/2026\/05\/step-01-converter-9-1536x1173.png 1536w\" sizes=\"auto, (max-width: 1600px) 100vw, 1600px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"three-types\">Three kinds of horsepower (and which one matters)<\/h2>\n\n\n\n<p>There are three different definitions of \u201chorsepower\u201d still in active use:<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"table table-hover\"><thead><tr><th>Type<\/th><th>Watts per HP<\/th><th>Where used<\/th><\/tr><\/thead><tbody><tr><td><strong>Mechanical horsepower<\/strong><\/td><td>745.69987<\/td><td>US automotive (this is what \u201c382 HP\u201d means on a Mustang)<\/td><\/tr><tr><td><strong>Metric horsepower (PS \/ CV \/ DIN HP)<\/strong><\/td><td>735.49875<\/td><td>German, French, Italian engine ratings (older catalogs)<\/td><\/tr><tr><td><strong>Electrical horsepower<\/strong><\/td><td>746 (exact)<\/td><td>EV motor ratings in some US contexts<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>The three differ by under 1.5% \u2014 small but real. A 100 kW car is:<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li><strong>134.10 mechanical HP<\/strong> (US standard)<\/li><li><strong>135.96 metric HP<\/strong> (German \u201cPS\u201d \/ French \u201cCV\u201d)<\/li><li><strong>134.05 electrical HP<\/strong><\/li><\/ul>\n\n\n\n<p>For practical car shopping in 2026, <strong>mechanical HP<\/strong> is the dominant US figure. <strong>Metric horsepower (PS)<\/strong> appears on European spec sheets for older \/ non-electrified vehicles \u2014 newer EU specs lead with kW. The difference between them (~1.4%) is rarely important for buying decisions.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"model-table\">Model-by-model spec table for popular cars<\/h2>\n\n\n\n<p>Powerful European and global cars commonly cross-shopped:<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"table table-hover\"><thead><tr><th>Make \/ model<\/th><th>EU spec (kW)<\/th><th>US\/UK spec (HP)<\/th><th>PS (metric)<\/th><th>Notes<\/th><\/tr><\/thead><tbody><tr><td>BMW M340i<\/td><td>285 kW<\/td><td>382 HP<\/td><td>387 PS<\/td><td>xDrive sedan, 2024<\/td><\/tr><tr><td>BMW M5 (G99)<\/td><td>535 kW<\/td><td>717 HP<\/td><td>727 PS<\/td><td>F1 hybrid system<\/td><\/tr><tr><td>Mercedes E 350<\/td><td>220 kW<\/td><td>295 HP<\/td><td>299 PS<\/td><td>Sedan<\/td><\/tr><tr><td>Mercedes EQS 580<\/td><td>385 kW<\/td><td>516 HP<\/td><td>523 PS<\/td><td>All-electric flagship<\/td><\/tr><tr><td>Audi RS6 Avant<\/td><td>463 kW<\/td><td>621 HP<\/td><td>630 PS<\/td><td>Wagon<\/td><\/tr><tr><td>Audi e-tron GT<\/td><td>350 kW<\/td><td>469 HP<\/td><td>476 PS<\/td><td>All-electric<\/td><\/tr><tr><td>Porsche 911 Carrera S<\/td><td>353 kW<\/td><td>473 HP<\/td><td>480 PS<\/td><td>Coupe<\/td><\/tr><tr><td>Porsche Taycan Turbo S<\/td><td>700 kW<\/td><td>938 HP<\/td><td>952 PS<\/td><td>2024+ overboost spec; pre-2024 was 560 kW \/ 750 hp<\/td><\/tr><tr><td>Volvo XC40 Recharge<\/td><td>300 kW<\/td><td>402 HP<\/td><td>408 PS<\/td><td>EV<\/td><\/tr><tr><td>VW Golf GTI<\/td><td>195 kW<\/td><td>261 HP<\/td><td>265 PS<\/td><td>2024 European spec<\/td><\/tr><tr><td>Hyundai Ioniq 5 N<\/td><td>478 kW<\/td><td>641 HP<\/td><td>650 PS<\/td><td>Performance EV<\/td><\/tr><tr><td>Tesla Model S Plaid<\/td><td>760 kW<\/td><td>1,020 HP<\/td><td>1,033 PS<\/td><td>Reported peak<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>The BMW M5\u2019s \u201c535 kW = 717 HP = 727 PS\u201d tells you the difference: same car, three numbers depending on which standard you\u2019re reading. PS is consistently 1.4% higher than mechanical HP because the metric horsepower\u2019s per-unit watts (735.5) is smaller.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"table\">Quick reference table<\/h2>\n\n\n\n<p>For typical car-shopping conversions:<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"table table-hover\"><thead><tr><th>kW<\/th><th>HP (mech)<\/th><\/tr><\/thead><tbody><tr><td>50<\/td><td>67<\/td><\/tr><tr><td>75<\/td><td>101<\/td><\/tr><tr><td>100<\/td><td>134<\/td><\/tr><tr><td>125<\/td><td>168<\/td><\/tr><tr><td>150<\/td><td>201<\/td><\/tr><tr><td>175<\/td><td>235<\/td><\/tr><tr><td>200<\/td><td>268<\/td><\/tr><tr><td>225<\/td><td>302<\/td><\/tr><tr><td>250<\/td><td>335<\/td><\/tr><tr><td>275<\/td><td>369<\/td><\/tr><tr><td>300<\/td><td>402<\/td><\/tr><tr><td>350<\/td><td>469<\/td><\/tr><tr><td>400<\/td><td>537<\/td><\/tr><tr><td>500<\/td><td>671<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"table table-hover\"><thead><tr><th>HP<\/th><th>kW<\/th><\/tr><\/thead><tbody><tr><td>100<\/td><td>75<\/td><\/tr><tr><td>150<\/td><td>112<\/td><\/tr><tr><td>200<\/td><td>149<\/td><\/tr><tr><td>250<\/td><td>186<\/td><\/tr><tr><td>300<\/td><td>224<\/td><\/tr><tr><td>350<\/td><td>261<\/td><\/tr><tr><td>400<\/td><td>298<\/td><\/tr><tr><td>500<\/td><td>373<\/td><\/tr><tr><td>600<\/td><td>447<\/td><\/tr><tr><td>700<\/td><td>522<\/td><\/tr><tr><td>800<\/td><td>597<\/td><\/tr><tr><td>1000<\/td><td>746<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p><strong>Mental math:<\/strong> kW \u00d7 4 \/ 3 \u2248 HP. (Actual factor is 1.341, but 4\/3 = 1.333 is close.)<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>200 kW \u00d7 4\/3 = 267 HP (actual: 268)<\/li><li>300 kW \u00d7 4\/3 = 400 HP (actual: 402)<\/li><\/ul>\n\n\n\n<p>For higher precision, use the full factor or <a href=\"https:\/\/www.xconvert.com\/unit-converter\/kilowatts-to-horsepower-(british)\">xconvert\u2019s calculator<\/a>.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"why-kw\">Why European catalogs use kW<\/h2>\n\n\n\n<p>The kilowatt is the <strong>SI unit for power<\/strong> \u2014 internationally standardized, unambiguous, and consistent with the rest of EU regulatory framework. EU vehicle homologation rules (which standardize what manufacturers must publish) specify engine power in kW. Manufacturers use kW because regulators require it; consumers across Europe have learned to read kW for that reason.<\/p>\n\n\n\n<p>The US never adopted the SI unit standard for automotive power, so HP persists. UK regulations recently shifted to kW for new homologations, but consumer-facing literature still leads with HP because that\u2019s what buyers expect.<\/p>\n\n\n\n<p>For comparison shopping across regions, both numbers are usually published \u2014 manufacturer websites with EU and US versions of the same model show kW in EU pages and HP in US pages of the same spec sheet.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"faq\">Frequently Asked Questions<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">Why is mechanical HP slightly different from metric HP (PS)?<\/h3>\n\n\n\n<p>Historical accident. The original definition of horsepower (James Watt, 1782) used 33,000 ft-lb\/min as \u201cthe rate at which one horse can do work.\u201d That converts to 745.7 watts. The metric horsepower defined later (Continental Europe) used a different reference work amount \u2014 75 kgf-m\/s \u2014 which converts to 735.5 watts. The difference is 1.4% and has no practical effect on car performance \u2014 it\u2019s purely a unit-system divergence.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">What about EV motors? Do they use mechanical or electrical HP?<\/h3>\n\n\n\n<p>Either, depending on the manufacturer. Tesla, Rivian, and Lucid use <strong>mechanical HP<\/strong> for marketing in the US. Porsche, BMW, and Audi tend to use <strong>metric HP (PS)<\/strong> in EU markets and mechanical HP in US markets. The difference is 0.04% (electrical 746 vs mechanical 745.7) \u2014 invisible for any practical purpose.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Are HP and torque the same thing?<\/h3>\n\n\n\n<p>No. <strong>Power (HP \/ kW)<\/strong> is the rate of doing work. <strong>Torque<\/strong> is rotational force. They\u2019re related but separate. A diesel truck might have low HP but enormous torque. An electric motor has high low-end torque and high HP at the rated RPM. Both numbers matter for performance, but they describe different things.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Why does my European spec say one kW number but the US version reports a higher HP?<\/h3>\n\n\n\n<p>Most often it\u2019s <strong>peak (boost) vs continuous<\/strong>. Manufacturers sometimes publish optimistic peak numbers that exceed the SAE-net continuous rating: e.g., the Porsche Taycan Turbo S sustains around 460 kW but reaches 700 kW (938 hp) for short bursts under launch control. EU type-approval generally lists the continuous rating; US marketing often quotes the peak. The conversion math is the same (\u00d7 1.341); the gap is which operating point each spec is reporting.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Should I convert N (Newtons) for towing too?<\/h3>\n\n\n\n<p>For towing capacity, you\u2019ll see ratings in <strong>kg, lb, or tons<\/strong> (units of mass). For pulling force, you\u2019ll see kgf or N. Conversions: 1 kgf = 9.807 N = 2.205 lb-force. xconvert has a <a href=\"https:\/\/www.xconvert.com\/unit-converter\/newtons-to-pound-force\">N to lb-force converter<\/a> for force-specific conversions.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">What\u2019s the difference between BHP, SAE HP, and DIN HP?<\/h3>\n\n\n\n<ul class=\"wp-block-list\"><li><strong>BHP (Brake Horsepower):<\/strong> Measured at the crankshaft, before transmission losses. Older British convention.<\/li><li><strong>SAE HP (SAE J1349 net):<\/strong> US standard for production vehicles. Measured under realistic operating conditions (with accessories, exhaust system, etc.).<\/li><li><strong>DIN HP \/ PS:<\/strong> German standard, similar methodology to SAE but using metric horsepower (735.5 W = 1 PS). Roughly equivalent to SAE HP for most engines.<\/li><\/ul>\n\n\n\n<p>For modern US car shopping, all you need is SAE HP. For European spec sheets, kW is the regulator-specified unit; PS is the colloquial conversion.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">How does kW compare to torque (Nm)?<\/h3>\n\n\n\n<p>A 200 Nm engine at 4000 RPM produces 200 \u00d7 4000 \/ 9549 = <strong>83.8 kW<\/strong>. For comparison purposes between engines: peak torque at peak RPM gives you peak power. EV motors deliver high torque at zero RPM (instantly), which is why a 300 kW EV feels punchier than a 300 kW gas engine even if peak HP is the same.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Try it now<\/h2>\n\n\n\n<p>For US\/UK \u201cHP\u201d (the mechanical horsepower most car ads use, 745.7 W per HP), use <a href=\"https:\/\/www.xconvert.com\/unit-converter\/kilowatts-to-horsepower-(british)\">KW to HP (British) converter<\/a>. For the German \u201cPS\u201d \/ DIN HP variant (735.5 W per metric HP), use <a href=\"https:\/\/www.xconvert.com\/unit-converter\/kilowatts-to-horsepower-(metric)\">KW to HP (Metric) converter<\/a>. For the reverse: <a href=\"https:\/\/www.xconvert.com\/unit-converter\/horsepower-(british)-to-kilowatts\">HP (British) to kW<\/a>. For EV-specific power conversions, see <a href=\"\/blog\/hp-to-kw-electric-vehicles\/\">HP to kW for Electric Vehicles<\/a>. For driving-related conversions (speed limits in Europe), see <a href=\"\/blog\/mph-to-kmh-driving-europe\/\">MPH to KM\/H for Driving in Europe<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>European car spec sheets list engine power in kW; US spec sheets use HP. This guide gives you the formula, a model-by-model conversion table for popular cars, and the difference between mechanical, electric, and metric horsepower.<\/p>\n","protected":false},"author":3,"featured_media":502,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[5,14],"tags":[],"class_list":["post-430","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-how-to-guides","category-tools"],"_links":{"self":[{"href":"\/blog\/wp-json\/wp\/v2\/posts\/430","targetHints":{"allow":["GET"]}}],"collection":[{"href":"\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"\/blog\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"\/blog\/wp-json\/wp\/v2\/comments?post=430"}],"version-history":[{"count":1,"href":"\/blog\/wp-json\/wp\/v2\/posts\/430\/revisions"}],"predecessor-version":[{"id":504,"href":"\/blog\/wp-json\/wp\/v2\/posts\/430\/revisions\/504"}],"wp:featuredmedia":[{"embeddable":true,"href":"\/blog\/wp-json\/wp\/v2\/media\/502"}],"wp:attachment":[{"href":"\/blog\/wp-json\/wp\/v2\/media?parent=430"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"\/blog\/wp-json\/wp\/v2\/categories?post=430"},{"taxonomy":"post_tag","embeddable":true,"href":"\/blog\/wp-json\/wp\/v2\/tags?post=430"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}