BMW Z4 M40i vs Mercedes-Benz AMG SL

How does the BMW Z4 M40i stack up against the Mercedes-Benz AMG SL? We put their headline specs side by side so you can see exactly where each car leads.

BMW Z4 M40iBMW Z4 M40i
vs
Mercedes-Benz AMG SLMercedes-Benz AMG SL
SpecBMW Z4 M40iMercedes-Benz AMG SL
Horsepower (max)382 hp585 hp
0-100 km/h (fastest)4.4 s3.6 s
Top speed250 km/h315 km/h
Variants13
Body styleRoadsterRoadster
GenerationG29R232
Production2019 – 20262022 – present
Length4,324 mm4,705 mm
Width1,864 mm1,915 mm
Height1,304 mm1,359 mm
Wheelbase2,470 mm2,700 mm

BMW Z4 M40i vs Mercedes-Benz AMG SL: common questions

Is the BMW Z4 M40i or Mercedes-Benz AMG SL faster?
The Mercedes-Benz AMG SL is quicker, hitting 0-60 mph in 3.4s versus the BMW Z4 M40i's 4.2s (0-100 km/h in 3.6s vs 4.4s).
Which has more horsepower, the BMW Z4 M40i or the Mercedes-Benz AMG SL?
The Mercedes-Benz AMG SL makes more power: 585 hp (436 kW) versus 382 hp (285 kW) for the BMW Z4 M40i.
Is the BMW Z4 M40i or Mercedes-Benz AMG SL faster on top speed?
The Mercedes-Benz AMG SL has the higher top speed at 196 mph (315 km/h), versus 155 mph (250 km/h) for the BMW Z4 M40i.
What is the main difference between the BMW Z4 M40i and the Mercedes-Benz AMG SL?
Both are roadsters in the same class. The Mercedes-Benz AMG SL has the power advantage, while the BMW Z4 M40i undercuts it, so the choice comes down to the spec differences above.