400 hp in the quarter mile at 2,200–4,600 lb
How Fast Is 400 Horsepower?
With 400 hp a 3,500 lb car should run roughly 12.00 seconds at 113.6 mph through the quarter mile. Change the weight below to see how your own car stacks up.
- 1/8-mile ET
- 7.69 sec
- 1/8-mile speed
- 90.8 mph
- Trap speed
- 182.8 km/h
- Weight per hp
- 8.75 lb/hp
- Conservative ET (Huntington)
- 12.96 sec
- Conservative trap (Huntington)
- 108.7 mph
400 hp quarter-mile times by weight
| Race weight | 1/4 mile ET | Trap speed | 0–60 (RWD) | lb per hp |
|---|---|---|---|---|
| 2,200 lb | 10.28 s | 132.6 mph | 2.97 s | 5.50 |
| 2,600 lb | 10.87 s | 125.4 mph | 3.40 s | 6.50 |
| 3,000 lb | 11.40 s | 119.5 mph | 3.81 s | 7.50 |
| 3,400 lb | 11.89 s | 114.7 mph | 4.21 s | 8.50 |
| 3,800 lb | 12.34 s | 110.5 mph | 4.60 s | 9.50 |
| 4,200 lb | 12.76 s | 106.9 mph | 4.99 s | 10.50 |
| 4,600 lb | 13.15 s | 103.7 mph | 5.36 s | 11.50 |
400 hp is serious street performance: territory for modern muscle and sports cars and well-built tuner cars. These numbers come from the ideal-traction formula, so treat the quicker end of each range as a best case.
The estimate uses the widely published Patrick Hale equations: ET = 5.825 × (weight ÷ hp)1/3 and MPH = 234 × (hp ÷ weight)1/3, with weight in pounds and hp measured at the crank. They are documented, along with the more conservative Huntington (6.290 / 224) and Fox constants, in Stealth316’s horsepower / ET / MPH calculator notes. See the full formulas and sources page.
What weight does 400 hp need to run a certain ET?
| Target ET | Max weight at 400 hp | Trap speed |
|---|---|---|
| 14.00 s | 5,553 lb | 97.4 mph |
| 13.00 s | 4,446 lb | 104.9 mph |
| 12.00 s | 3,497 lb | 113.6 mph |
| 11.00 s | 2,694 lb | 123.9 mph |
| 10.00 s | 2,024 lb | 136.3 mph |
| 9.00 s | 1,475 lb | 151.5 mph |
For example, 400 hp is enough to run a 12.00 second quarter in a car up to 3,497 lb, and a 10.00 second pass at 2,024 lb or lighter.
400 hp compared with 350 and 450 hp
At 3,500 lb, going from 350 to 400 hp saves 0.55 s, and going on to 450 hp saves a further 0.46 s. Gains shrink as power rises because ET follows a cube root, so the same 50 hp is worth less each time. At 400 hp, the 1/8-mile ET for 3,500 lb is about 7.69 s at 90.8 mph.
The power-to-weight of a 3,500 lb car with 400 hp is 8.75 lb per hp, or 252 hp per tonne. See all horsepower comparisons.
Frequently asked questions
How fast is 400 hp in the quarter mile?
A 3,500 lb car with 400 crank hp is estimated at 12.00 s at 113.6 mph. Lighter cars are quicker, heavier ones slower.
How fast is 400 hp from 0 to 60?
At 3,500 lb a rear-wheel-drive car estimates about 4.31 s, all-wheel drive about 3.97 s.
Is 400 wheel hp the same as 400 hp?
No. If 400 is wheel horsepower, the crank figure is higher, about 471 hp on a rear-wheel-drive car. Use the WHP to HP converter.
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