The 250 S was fitted with 2,496 cc M108 engine with dual two-barrel downdraft carburettors producing at 5,400 rpm. It could accelerate to in 13 seconds for manual and 14 for automatic. The top speed was for manual and for automatic. The 250 SE had the same engine as 250 S except for fuel injection system and different engine designation (M129). With increased engine output of at 5,500 rpm, 250 SE was one second faster to 100 km/h than 250 S and had higher top speed of for both manual and automatic versions.