What Is the Average Horsepower of a Car?

Ask this question in a pub and you'll get answers ranging from 120 to 400. The reason for the spread is that "average car" means completely different things in Ohio and in Naples — and that the number has moved further in the last fifty years than almost any other vehicle statistic.

Where the Figure Comes From

The authoritative source for the US is the EPA Automotive Trends Report, published annually since the 1970s. It tracks every new light-duty vehicle — cars, SUVs, minivans and pickups — and reports fleet averages for fuel economy, CO₂, weight, footprint and horsepower.

Recent figures from that dataset:

Two caveats worth carrying into any comparison. First, preliminary figures are based on manufacturers' pre-model-year projections and are routinely revised. Second, "light-duty vehicle" includes full-size pickups, which pull the average up a lot — the average car in the narrow sense is lower than the average vehicle.

Fifty Years of Horsepower

The long view is where this gets interesting, because the trend isn't a straight line. It collapses, then climbs relentlessly for four decades.

The numbers that matter from that table:

• Average power rose about 88% from 1975 to 2022
• Measured from the 1981 trough it is up roughly 153%
• Average weight in 2022 was only about 6% above 1975 — the cars got dramatically more powerful without getting proportionally heavier
• The average new car now reaches 60 mph in 7.6 seconds, less than half the early-1980s figure

The malaise era, in one statistic

That 1981 figure of roughly 102 hp is worth sitting with. Emissions regulations arrived before the technology to meet them efficiently existed, so manufacturers dropped compression ratios, retarded timing and strangled intakes. A 5.7-liter V8 of that period could make less power than a modern 1.5-liter turbo three-cylinder.

It also marks the moment the industry stopped quoting SAE gross horsepower and switched to net. Some of the apparent collapse in published figures between 1971 and 1972 was the measurement standard changing rather than the engines — see how horsepower is measured for that story.

How Cars Got Faster and More Efficient Simultaneously

The usual assumption is that power and economy trade off against each other. Over the last three decades they didn't — both improved together, because the technologies that raised one raised the other.

The common thread is control. An engine management system that can vary timing, lift, fuel pressure and boost thousands of times a second no longer has to compromise between a power tune and an economy tune — it can run both, moment to moment.

Why Europe's Average Is So Much Lower

There's no single global figure, and the gap isn't mostly about taste. It is structural.

• Fleet mix. The US average is dragged up by full-size pickups and large SUVs that barely exist in most European markets.
• Taxation by power. Several European countries tax vehicles directly on kilowatts. Italy adds a surtax on every kW above 185; Austria prices motor tax from the kW figure; France and Belgium use fiscal horsepower. Buying power costs money every year, not just once.
• Fuel price. Gasoline at two to three times US prices reshapes what buyers specify.
• Urban geometry. Older cities favor smaller cars, and smaller cars need less power to feel adequate.

The practical upshot: a European family hatchback at 110–150 hp and 1,300 kg has a power-to-weight ratio not far off an American mid-size SUV with 250 hp and 2,000 kg. The ratio travels better than the raw number — which is why kW per tonne is the metric European and Australian magazines actually use.

What Electrification Did to the Average

Electric drivetrains changed the economics of power. A larger motor and inverter cost far less to add than a larger engine, and peak output is limited more by battery discharge and cooling than by displacement. Entry-level EVs consequently arrive with power figures that would have been performance-car territory a decade ago.

The EPA quantified this directly: excluding battery electric and plug-in hybrid vehicles would have cut the model year 2024 fleet average by 13 horsepower and 72 pounds. So a meaningful slice of recent horsepower growth is electrification, not bigger engines.

One caveat when comparing EV numbers with engine numbers: brochure EV figures are usually short-duration peak outputs, while a combustion engine's rating is a sustained net figure. Compare like with like — more on that in kW to bhp.

Rough Averages by Segment

Fleet averages hide enormous spread. Typical current ranges:

Note how the hp-per-ton column compresses the picture. A full-size pickup with 400 hp isn't far off a compact SUV in how it accelerates, because it is carrying half a tonne more.

How Much Horsepower Do You Actually Need?

Almost certainly less than the current average. What matters is the ratio, not the number:

• Under 60 hp per US ton — noticeably slow, requires planning to overtake
• 60–80 — adequate for everyday driving
• 80–120 — comfortably brisk, effortless highway merging
• 120–170 — genuinely quick, 0–60 in the six-second range
• Over 200 — fast enough that tires and traction start to be the limit

A 3,000 lb car with 180 hp sits at 120 hp per ton and will feel livelier than a 5,000 lb SUV with 280 hp at 112. Work yours out with the power-to-weight ratio calculator, and see how much horsepower does a car need for the longer version of this argument.

Reading Horsepower Claims Critically

Three things to check before comparing any two figures:

1. Which unit? A European "200" is usually 200 PS, which is 197 bhp. See bhp to PS.
2. Which standard? SAE J1349 net and ECE R85 are comparable; pre-1972 SAE gross isn't.
3. Crank or wheels? A dyno figure is 11–23% below the crankshaft rating. See whp to hp.