1971 Chevelle Engine Horsepower & Torque Specifciations

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GM published both gross and net horsepower/torque ratings for 1971 in preparation for the net ratings in 1972. Gross ratings are shown here with (G) and net ratings with (N) for comparison.
Engine Specifications
Engine TypeCubic InchesHorsepower @ RPMTorque @ RPM
I6250 (STD)145 @ 4200 (G)
110 @ 3800 (N)
230 @ 1600 (G)
185 @ 1600 (N)
V8307 (STD)200 @ 4600 (G)
140 @ 4400 (N)
300 @ 2400 (G)
235 @ 2400 (N)
V8350 (RPO L65)245 @ 4800 (G)
165 @ 4000 (N)
350 @ 2800 (G)
280 @ 2400 (N)
V8350 (RPO L48)270 @ 4800 (G)
175 @ 4000 (N)
360 @ 3200 (G)
290 @ 2400 (N)
V8402 (RPO LS3)300 @ 4800 (G)
260 @ 4400 (N)
400 @ 3200 (G)
345 @ 3200 (N)
V8454 (RPO LS5)365 @ 4800 (G)
285 @ 4000 (N)
465 @ 3200 (G)
390 @ 3200 (N)