Comparison
Z4 M40i (Alpine White) vs AMG GT AMG GT 63 (Polar White)
Head-to-head across 2 brand(s). Differing rows are highlighted; ▲ marks the best value in a row.
| Specification |  BMW · 2026 Z4 M40i Alpine White Remove |  Mercedes-Benz · 2026 AMG GT AMG GT 63 Polar White Remove |
|---|---|---|
| Overview | ||
| Brand | BMW | Mercedes-Benz |
| Model | Z4 | AMG GT |
| Variant / Trim | M40i | AMG GT 63 |
| Body type | Coupe | Coupe |
| Vehicle class | Sport | Sport |
| Model year | 2026 | 2026 |
| Powertrain | ICE | ICE |
| Segment | S | S |
| Seating capacity | 2 seats | 2 seats |
| Doors | 2 | 2 |
| Country of origin | Germany | Germany |
| Availability | On sale | On sale |
| Colors | ||
| Exterior colors | Alpine White | Polar White |
| Powertrain & Performance | ||
| Engine type | B58 3.0L 6-cylinder turbo | M177 4.0L V8 Biturbo |
| Displacement | 2,998 cc | 3,982 cc |
| Cylinders | 6 | 8 |
| Aspiration | Turbo | Twin-turbo |
| Fuel type | Petrol | Petrol |
| Max power | 340 hp | 585 hp▲ best |
| Max torque | 500 Nm | 800 Nm▲ best |
| Transmission | 8-speed Steptronic Sport | AMG Speedshift TCT 9G |
| Drivetrain | RWD | AWD |
| 0–100 km/h | 4.5 s | 3.2 s▲ best |
| Top speed | 250 km/h | 315 km/h▲ best |
| Fuel consumption | 7.4 L/100km▲ best | 11.5 L/100km |
| Dimensions & Weight | ||
| Length | 4,324 mm | 4,729 mm |
| Width | 1,864 mm | 1,984 mm |
| Height | 1,304 mm | 1,360 mm |
| Wheelbase | 2,470 mm | 2,700 mm▲ best |
| Ground clearance | 115 mm▲ best | 110 mm |
| Kerb weight | 1,575 kg | 1,950 kg |
| Boot capacity | 281 L | 321 L▲ best |
| Fuel tank | 52 L | 65 L▲ best |
| Chassis, Wheels & Brakes | ||
| Front suspension | Double-wishbone | Double wishbone |
| Rear suspension | Multi-link | Multi-link |
| Front brakes | Ventilated discs | Ventilated disc |
| Rear brakes | Solid discs | Ventilated disc |
| Wheel size | 19 in | 21 in |
| Tyre size | 225/45 R18 | 285/30 R21 |
| Interior & Comfort | ||
| Upholstery | Leather | Leather |
| Climate control | Dual-zone automatic climate control | ✓ |
| Panoramic roof | — | — |
| Wireless charging | ✓ | ✓ |
| Infotainment & Connectivity | ||
| Central screen | 10.25 in | 10.25 in |
| Apple CarPlay | Wireless | Wireless |
| Android Auto | No | Wireless |
| Speakers | 12▲ best | 10 |
| Safety & ADAS | ||
| Airbags | 4 | 6▲ best |
| ADAS level | L1 | L2 |
| Adaptive cruise control | ✓ | ✓ |
| Auto emergency braking | ✓ | ✓ |
| 360° camera | — | ✓ |
| Parking sensors | Rear | Front & rear |
| ISOFIX points | 0 | 0 |
| Tyre-pressure monitoring | ✓ | ✓ |
| Warranty & Ownership | ||
| Vehicle warranty (years) | 3 yr▲ best | 2 yr |
| Vehicle warranty (distance) | 100,000 km | 999,999 km▲ best |