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 SL 65 AMG (R231)
Convertible · Gasoline
Car B
Mercedes-Benz SL 65 AMG (R231)
A two-seat luxury performance car powered by a V12, with 0–100 km/h in 4.0 s and a 300 km/h top speed. Best for premium comfort and long trips, less so for everyday practicality and cargo needs.
Why compared
same body typesame powertrainsame seatsstrong ranking match
Usage fit
Family
34
/
23
City
38
/
12
Budget / value
53
/
10
Road trip
39
/
50
Performance
37
/
55
Cargo
7
/
5
Practical
26
/
6
Premium
55
/
90
Winter
26
/
30
Scores out of 100. Blue = BMW Z4 M40i · Orange = Mercedes-Benz SL 65 AMG (R231)
Specs side-by-side
Spec
BMW Z4 M40i
Mercedes-Benz SL 65 AMG (R231)
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 SL 65 AMG (R231)
- V12 surge: 630 hp and 1000 Nm for effortless acceleration (0–100 km/h in 4.0 s).
- 300 km/h top speed for confident high-speed cruising.
- Luxury focus supports relaxed long-distance driving.
- Strong safety standing in its segment.
- Only two seats limit family use.
- 240 L trunk restricts cargo for bulky gear.
- Combined consumption of 11.6 L/100 km raises running costs.
- High purchase price (255000).
Verdict
Pick BMW Z4 M40i if…
Best fuel economy
BMW Z4 M40i uses 7.0 L/100km vs 11.6 — a meaningful saving if you cover high mileage.
Pick Mercedes-Benz SL 65 AMG (R231) if…
More power
Mercedes-Benz SL 65 AMG (R231) puts out 630 hp vs 340 — meaningfully quicker and more confident on motorways.