JR, the 94-95 104 engines are lower revving for a given speed and have more torque at a lower rpm than the 90-92 104 engines. Specifically, the 94-95 104 engines develop 217hp at 5,500rpm and 229ft-lb torque at 3,750rpm while the 90-92 104 engines develop 217hp at 6,400rpm and 195ft-lb torque at 4,600rpm. I own each and the 1995 E320 is quicker than the 1992 300CE, and is more refined due to the lower revving engine.

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Fred Hoelzle