2021 BMW M5 CS (F90) vs 2024 Audi RS 6 Avant GT (C8)
| Engine | |
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| Drivetrain | |
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| Top Speed | |
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| Acceleration | |
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| Total Power | |
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| Economy | |
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| Kerb Weight | |
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| Luggage | |
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| Top Speed | |
190 mph / 306 Km/h | 190 mph / 306 Km/h |
| 0-62 mph | |
3.0 seconds | 3.3 seconds |
| Power-to-Weight | |
343 BHP/Tonne / 2.92 kg/BHP | 299 BHP/Tonne / 3.34 kg/BHP |
| Total Power | |
626 BHP / 635 ps | 621 BHP / 630 ps |
| Total Torque | |
553 lb·ft / 750 N·m | 627 lb·ft / 850 N·m |
| Economy | |
25.9 mpg | 23.2 mpg |
| Total Range | |
387 Miles | 372 Miles |
| CO2 Emissions | |
253 g/Km | 277 g/Km |
| UK Tax Cost | |
£200 | £200 |
| Model Platform | |
5 Series (17-24) | A6 (18-25) |
| Doors | |
4 | 5 |
| Seats | |
4 | 5 |
| Cargo Space | |
530 L | 548-1,658 L |
| Turning Circle | |
12.6 m | 12.1 m |
| Kerb Weight | |
1,825 kg | 2,075 kg |
| Gross Weight | |
2,290 kg | 2,725 kg |
| Tow Capacity | |
750-2,100 kg | |
| Length | |
5,001 mm | 5,010 mm |
| Width | |
1,903 mm | 1,951 mm |
| Height | |
1,468 mm | 1,477 mm |
| Wheelbase | |
2,982 mm | 2,929 mm |
| Front Track | |
1,625 mm | 1,668 mm |
| Rear Track | |
1,594 mm | 1,650 mm |
| Engine Name | |
S63B44 | |
| Configuration | |
V8 | V8 |
| Displacement | |
4.4 Litre / 4,395 cc | 4 Litre / 3,996 cc |
| Peak Power | |
626 BHP / 635 ps | 621 BHP / 630 ps |
| Peak Torque | |
553 lb·ft / 750 N·m | 627 lb·ft / 850 N·m |
| Specific Output | |
142 BHP/L | 155 BHP/L |
| Aspiration | |
Bi-Turbo | Bi-Turbo |
| Valvetrain | |
DOHC | DOHC |
| Valves/Cylinder | |
4 (32v Total) | 4 (32v Total) |
| Fuel | |
Petrol | Petrol |
| Compression | |
10:1 | 9.7:1 |
| Bore x Stroke | |
89 x 88.3 mm | 86 x 86 mm |
| Fuel Delivery | |
Direct Injection | Direct Injection |
| Position | |
Front | Front |
| Orientation | |
Longitudinal | Longitudinal |
| Fuel Tank | |
68 L | 73 L |
| Peak Power | |
4 BHP / 4 ps | |
| Battery Size | |
0.81 kWh | |
| Driven Wheels | |
Rear-biased Part-time All (4WD) | All (AWD) |
| Front Tyres | |
275/35R20 Y | 285/30 ZR22 |
| Rear Tyres | |
285/35R20 Y | 285/30 ZR22 |
| Gearbox (AT) | |
8 Gears | 8 Gears |
| Front Brakes | |
Vented Disc | Vented Disc |
| Rear Brakes | |
Vented Disc | Vented Disc |
| Front Suspension | |
Double Wishbone | Multi-Link |
| Rear Suspension | |
Multi-Link | Multi-Link |