[davesz4mc]

I always considered HP as an engines efficiency past peak TQ, with the below extrapolations it reveals the BMW engine is way more efficient at maintaining TQ over a wider range of RPM’s. The engines would potentially equal efficiency at around 3,918 RPM with each making 220 HP and 295 TQ based on an SAE dyno of the L98.

2.5k to 4.3k power band = 1,800 RPM of over 290 TQ, 13.9 @ 101 1/4
3.9k to 8.3k power band = 4,400 RPM of over 295 TQ, 12.9 @ 108 1/4

The Vette has the early get it moving power advantage, the BMW has the longer power band advantage.

If the L98 were to rev match the M3 it would = 175 HP 111 TQ at 8300 RPM and explode

Compare S65 to the L98 power band at 2,500 – 4,500 RPM
143 HP 300 TQ to 248 HP 290 TQ = Gain of 105 HP and loss of 10 TQ
95 HP 200 TQ to 257 HP 300 TQ = Gain of 162 HP and gain of 100 TQ

Compare the L98 to S65 power band at 3,900 – 8,300 RPM
220 HP 296 TQ to 175 HP 111 TQ over 4,400 RPM = A loss of 45 HP and loss of 64 TQ (L98)
220 HP 296 TQ to 414 HP 261 TQ over 4,400 RPM = Gain of 194 HP and loss of 35 TQ (BMW).


Car 1 1991 corvette with the L98 engine
Rated in SAE
Horsepower: 240 HP @ 4,300 RPM *= 293 TQ
Torque: 340 lb-ft @ 3,200 rpm *= 207 HP
This was a torque beast and jumped off the line.


Car 2 2012 m3
Rated in SAE
Horsepower: 414 @ 8300 RPM *= 261 TQ
Torque: 295 @ 3900 RPM *= 219 HP
High reving v8 that needed to get to the upper rpms to build power.