Car A
BMW Z4 M40i
Two-seat roadster that delivers strong performance and a premium feel, with 340 hp and 0–100 km/h in 4.5 s. Efficient for its class at 7 L/100 km, but practicality is limited.
BMW Z4 M40i
Convertible · Gasoline
vs
Mercedes-Benz AMG SL
Convertible · Gasoline
Car B
Mercedes-Benz AMG SL
A performance-focused two-seater that blends premium comfort with serious speed. Very quick acceleration and a 300 km/h top speed suit road trips and spirited drives, but space and efficiency are limited.
Why compared
same body typesame powertrainsame seatssecondary usage matchstrong ranking match
Usage fit
Family
34
/
22
City
38
/
12
Budget / value
53
/
11
Road trip
39
/
50
Performance
37
/
45
Cargo
7
/
3
Practical
26
/
6
Premium
55
/
84
Winter
26
/
30
Scores out of 100. Blue = BMW Z4 M40i · Orange = Mercedes-Benz AMG SL
Specs side-by-side
Spec
BMW Z4 M40i
Mercedes-Benz AMG SL
Values are representative — confirm for your market and trim.
Pros & cons
BMW Z4 M40i
- Serious pace and power: 340 hp, 500 Nm, 0–100 km/h in 4.5 s
- Efficient for its class at a combined 7 L/100 km
- Premium roadster character suits city driving and relaxed road trips
- 281‑liter trunk accommodates weekend luggage for two
- Only two seats; not a family or carpool solution
- Modest cargo capacity; weak fit for cargo-heavy use
- Premium pricing at 61,000
- Gasoline-only powertrain with no electrified option
Mercedes-Benz AMG SL
- Rapid 0–100 km/h in 3.2 s
- 300 km/h top speed for serious performance
- V8 biturbo punch (476 hp, 700 Nm) for effortless passing
- Strong safety ranking in its class
- Two seats only; not family-friendly
- Small trunk (200 L) limits luggage
- 11.2 L/100 km combined consumption isn’t efficient
- Premium price (~140,000) if performance isn’t your main priority
Verdict
Pick BMW Z4 M40i if…
Best fuel economy
BMW Z4 M40i uses 7.0 L/100km vs 11.2 — a meaningful saving if you cover high mileage.
Pick Mercedes-Benz AMG SL if…
More power
Mercedes-Benz AMG SL puts out 476 hp vs 340 — meaningfully quicker and more confident on motorways.