Car A
Mercedes-Benz SL 450
A two-seat luxury performance car that blends a strong 367 hp V6 with long-distance comfort. Best for buyers prioritizing premium feel and pace over cargo space and family versatility.
Mercedes-Benz SL 450
Convertible · Gasoline
vs
BMW Z4 M40i
Convertible · Gasoline
Car B
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.
Why compared
same body typesame powertrainsame ranking profilesame seatssecondary usage matchstrong ranking match
Usage fit
Family
21
/
34
City
17
/
38
Budget / value
18
/
53
Road trip
48
/
39
Performance
40
/
37
Cargo
2
/
7
Practical
8
/
26
Premium
70
/
55
Winter
30
/
26
Scores out of 100. Blue = Mercedes-Benz SL 450 · Orange = BMW Z4 M40i
Specs side-by-side
Spec
Mercedes-Benz SL 450
BMW Z4 M40i
Values are representative — confirm for your market and trim.
Pros & cons
Mercedes-Benz SL 450
- 367 hp and 500 Nm deliver confident passing and engaging performance
- Refined two-seat cabin prioritizes premium comfort for long drives
- 9 L/100 km combined is efficient for its class
- Segment signals point to strong safety standing
- Only two seats limit family use
- Small 187 L trunk restricts luggage capacity
- High purchase price at 91,750
- Emphasis on luxury and performance over everyday practicality
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
Verdict
Pick Mercedes-Benz SL 450 if…
Efficiency & everyday ease
Mercedes-Benz SL 450 is the choice if fuel economy and city-friendly driving are your priority.
Pick BMW Z4 M40i if…
Performance & capability
BMW Z4 M40i is the choice if you want more power, speed, or all-weather capability.