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Here are the specs for the U.S.-model 450 SE engine.
1973 U.S. M 117.983 Engine
4-stroke gasoline injection electronically controlled
8 cylinders in V
Bore: 92 mm
Stroke: 85 mm
Displacement: 4520 cc
Compression ratio: 8.0:1
Firing order: 1-5-4-8-6-3-7-2
Maximum rpm: 5800
SAE net max. power: 190 hp @ 4750 rpm
(In California: 180 hp @ 4750 rpm)
SAE net torque: 240 lb-ft @ 3000 rpm
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