Ford's Super Duty diesel makes 1,200 lb-ft of torque, nearly three times a Mustang GT's 415. Yet on Ford's own spec sheet it out-powers the Mustang by just 20 hp.
The short answer
Torque is the twisting force an engine puts on its crankshaft. Horsepower is how fast that force does work: torque times rpm, divided by 5,252. An engine can make big power with modest torque by revving high, or big torque with modest power by staying low. As The Drive notes, where each one falls in the rev range, plus gearing, decides how a car accelerates.
What is torque?
Torque is how hard the engine twists. Motor1 puts it simply: it measures the strength of a twisting force, and in a car that is the twist on the crankshaft. It is quoted in pound-feet (lb-ft) or newton meters (Nm), and NIST's conversion table puts 1 lb-ft at 1.355818 Nm.
What is horsepower?
Horsepower is a rate. The Drive's line is a good one to keep: torque does the work, horsepower is how fast that work gets done.
The unit goes back to James Watt. By the usual story, he figured a horse could steadily lift 33,000 pounds one foot in a minute. Edmunds gives the same thing per second: 550 pounds, one foot, in one second. NIST sets one horsepower at 745.6999 watts.
How are horsepower and torque related?
By one formula: horsepower equals torque times rpm, divided by 5,252.
That 5,252 is not magic. It is Watt's 33,000 divided by 2 pi, the angle of one full turn in radians. It also means that at exactly 5,252 rpm, horsepower and torque are the same number. That is why, on a dyno chart in lb-ft and hp that runs past 5,252 rpm, the two curves cross there, as both Edmunds and Motor1 point out.
Real engines, side by side
Here are four cars, with figures from each maker's own pages.
| Car | Power | Torque | Note |
|---|---|---|---|
| 2026 Ford Mustang GT, 5.0 V8 | 480 hp at 7,150 rpm | 415 lb-ft at 4,900 rpm | standard engine, 93 octane |
| 2027 Ford Super Duty, 6.7 High-Output diesel | 500 hp at 2,600 rpm | 1,200 lb-ft at 1,600 rpm | up to 30,000 lb conventional towing (Ford's max) |
| 2025 Porsche 911 GT3, 4.0 boxer | 502 hp | 331 lb-ft | revs to 9,000 rpm |
| Hyundai IONIQ 5 N (N Grin Boost) | 478 kW (about 641 hp) | 770 Nm (about 568 lb-ft) | motors spin to 21,000 rpm |
Now run the formula. At the Mustang's 4,900 rpm torque peak, 415 lb-ft works out to about 387 hp. By its 7,150 rpm power peak, torque has eased to about 353 lb-ft, but the revs more than make up for it.
The diesel is the mirror image. At 1,600 rpm its 1,200 lb-ft is only about 366 hp. At its 2,600 rpm power peak, it is still twisting about 1,010 lb-ft.
The GT3 makes 84 lb-ft less torque than the Mustang and 22 hp more. The math says how: to reach 502 hp with no more than 331 lb-ft, the boxer engine has to be spinning at least about 7,965 rpm. Porsche lets it rev to 9,000.
Why do diesels make so much torque?
They make it low in the rev range. Motor1 calls diesels the classic case: very high torque at low rpm for hauling, but less horsepower because the engine does not rev as high. The Super Duty makes its peak torque at 1,600 rpm and its peak power at 2,600 rpm, well below where the Mustang makes either.
Why do EVs feel so quick off the line?
The Drive says it plainly: an EV has all of its torque from zero rpm, but not all of its power. Motor1 adds that electric motors hit peak torque practically instantly and often taper at the top end. The IONIQ 5 N's motors also spin to 21,000 rpm, more than twice the GT3's limit.
On the street
Read both numbers on the spec sheet, and read the rpm next to each. A big torque figure at low rpm means the car pulls hard from a stop and tows well. A big horsepower figure at high rpm means it keeps pulling as the revs climb. Edmunds notes that at low speeds the gears do the work of sending maximum torque to the wheels, while holding a high speed calls for horsepower.
If you want to know how engines add power, we covered turbo vs supercharger.
FAQ
Is torque or horsepower more important?
It depends on the job. Motor1 says horsepower is the better guide to top speed, while torque arguably matters more for 0 to 60.
Why do horsepower and torque cross at 5,252 rpm?
Because horsepower is torque times rpm divided by 5,252. At that speed the two numbers are equal, in lb-ft and hp.
How do I convert newton meters to lb-ft?
Divide by 1.355818. The IONIQ 5 N's 770 Nm is about 568 lb-ft.
Does more torque mean faster acceleration?
Off the line, often. But gearing changes what reaches the wheels, so compare power and the rpm where it peaks too.
Sources
- 2026 Ford Mustang specs (Ford), read 2026-11-06
- 2027 Ford Super Duty specs (Ford), read 2026-11-06
- The 2025 911 GT3 and 911 GT3 with Touring Package (Porsche Newsroom), read 2026-11-06
- The all-new IONIQ 5 N World Premiere (Hyundai Motor Group), read 2026-11-06
- The Difference Between Horsepower And Torque (Motor1), read 2026-11-06
- The Twist on Torque (Edmunds), read 2026-11-06
- Horsepower vs. Torque: What's the Difference? (The Drive), read 2026-11-06
- NIST Guide to the SI, Appendix B.9 (NIST), read 2026-11-06