Factory Engine Specifications (bore, stroke, horsepower, torque, compression ratio)

1969 472 DeVille
Displacement: 472 cubic inches
Bore and stroke: 4.30 x 4.06 inches
Compression ratio: 10.5:1
Brake horsepower: 375 @ 4400 rpm
Torque: 525 @ 3000 rpm

1970 472 DeVille
Displacement: 472 cubic inches
Bore and stroke: 4.30 x 4.06 inches
Compression ratio: 10.0:1
Brake horsepower: 375 @ 4400 rpm
Torque: 525 @ 3000 rpm

1970 500 Eldorado
Displacement: 500 cubic inches
Bore & stroke: 4.300 x 4.304 inches
Compression ratio: 10.0:1
Brake horsepower: 400 @ 4400 rpm
Torque: 550 @ 3000 rpm

1971 472 DeVille
Displacement: 472 cubic inches
Bore and stroke: 4.300 x 4.060 inches
Compression ratio: 8.8:1
Brake horsepower (SAE gross): 375 @ 4400 rpm
Torque: 525 @ 3000 rpm

1971 500 Eldorado
Displacement: 500 cubic inches
Bore & stroke: 4.30 x 4.304 inches
Compression ratio: 10.5:1
Brake horsepower (SAE gross): 400 @ 4400 rpm
Torque: 550 @ 3000 rpm

1972 472 DeVille
Displacement: 472 cubic inches
Bore and stroke: 4.300 x 4.060 inches
Compression ratio: 8.5:1
Brake horsepower (net SAE): 220 @ 4400 rpm
Brake horsepower (gross SAE): 345 @ 4400 rpm
Torque: 365 @ 2400 rpm

1972 500 Eldorado
Displacement: 500 cubic inches
Bore & stroke: 4.300 x 4.304 inches
Compression ratio: 8.5:1
Brake horsepower (SAE net): 365 @ 4400 rpm
Brake horsepower (SAE gross): 400 @ 4400 rpm
Torque: 535 @ 3000 rpm

1973 472 DeVille
Displacement: 472 cubic inches
Bore and stroke: 4.300 x 4.060 inches
Compression ratio: 8.5:1
Brake horsepower (net SAE): 220 @ 4400 rpm
Torque: 365 @ 2400 rpm

1973 500 Eldorado
Displacement: 500 cubic inches
Bore & stroke: 4.300 x 4.304 inches
Compression ratio: 8.5:1
Brake horsepower (SAE gross): 365 @ 4400 rpm
Torque: 535 @ 3000 rpm

1974 472 DeVille
Displacement: 472 cubic inches
Bore and stroke: 4.300 x 4.060 inches
Compression ratio: 8.25:1
Brake horsepower (net SAE): 205 at 4400 rpm
Torque: 365 @ 2400 rpm

1974 500 Eldorado
Displacement: 500 cubic inches
Bore & stroke: 4.300 x 4.304 inches
Compression ratio: 8.5:1
Brake horsepower (SAE gross): 365 @ 4400 rpm
Torque: 535 @ 3000 rpm

1975 & 1976 500
Displacement: 500 cubic inches
Bore and stroke: 4.300 x 4.304 inches
Compression ratio: 8.25:1
Brake horsepower (net SAE): 210 @ 3600 rpm
Torque: 380 @ 2000 rpm