Comparison BMW 6 Series Convertible (F12) 640i (320 Hp) xDrive Steptronic & Audi A6 Avant (4G, C7 facelift 2014) Competition 3.0 BiTDI V6 (326 Hp) quattro Tiptronic
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| Brand: | BMW | Audi |
| Model: | 6 Series | A6 |
| Generation: | 6 Series Convertible (F12) | A6 Avant (4G, C7 facelift 2014) |
| Engine / modification: | 640i (320 Hp) xDrive Steptronic | Competition 3.0 BiTDI V6 (326 Hp) quattro Tiptronic |
| Production start: | 2013 year | 2014 year |
| Production end: | 2015 year | 2018 year |
| Coupe type: | Cabriolet | Sedan |
| Num. of Doors: | 2 | 5 |
| Num. of seats: | 4 | 5 |
| Fuel consumption / economy - urban: | 11.2-11.4 l/100 km | 7.7 l/100 km |
| Fuel consumption / economy - extra urban: | 6.5-6.6 l/100 km | 5.7 l/100 km |
| Fuel consumption / economy - combined: | 8.2-8.4 l/100 km | 6.4 l/100 km |
| Fuel Type: | Petrol (Gasoline) | Diesel |
| Drag coefficient: | 0.31 | 0.30 |
| Fuel tank volume: | 70 l | 73 l |
| Emission standard: | Euro 6 | Euro 6 |
| CO2 emissions: | 192-195 g/km | 169 g/km |
| Power: | 320 hp | 326 hp |
| Max power in: | 5800-6000 rpm. | 4000-4500 rpm. |
| Maximum speed: | 250 km/h | 250 km/h |
| Acceleration from 0 to 100 km/h: | 5.4 sec | 5.1 sec |
| Torque: | 450 Nm @ 1300-4500 rpm. | 650 Nm @ 1400-2800 rpm. |
| Model Engine: | N55B30 | CVUB |
| Engine position: | Front, longitudinal | Front, longitudinal |
| Engine displacement: | 2979 cm3 | 2967 cm3 |
| Engine oil capacity: | 6.5 l | 6.4 l |
| Coolant: | 10.2 l | 11.5 l |
| Fuel System: | Direct injection | Diesel Commonrail |
| Aspiration / Turbine: | Twin-power turbo | BiTurbo |
| Position of cylinders: | Inline | V engine |
| Valvetrain: | DOHC | |
| Number of cylinders: | 6 | 6 |
| Number of valves per cylinder: | 4 | 4 |
| Compression ratio: | 10.2 | 16 |
| Piston Stroke: | 89.6 mm | 91.4 mm |
| Cylinder Bore: | 84 mm | 83 mm |
| Wheel Drive: | All wheel drive (4x4) | All wheel drive (4x4) |
| Number of Gears (automatic transmission): | 8 Steptronic | 8 Tiptronic |
| Length: | 4894 mm | 4943 mm |
| Width: | 1894 mm | 1874 mm |
| Width including mirrors: | 2086 mm | |
| Height: | 1365 mm | 1461-1482 mm |
| Wheelbase: | 2855 mm | 2912 mm |
| Front track: | 1600 mm | 1627 mm |
| Rear (Back) track: | 1665 mm | 1618 mm |
| Ride height(clearance): | 123 mm | |
| Front overhang: | 930 mm | |
| Rear overhang: | 1101 mm | |
| Minimum volume of Luggage (trunk): | 300 l | 565 l |
| Maximum amount of Luggage (trunk): | 350 l | 1680 l |
| Front suspension: | Double wishbone | Multi-link suspension |
| Rear suspension: | Multi-link independent | Independent on trapezoidal lever |
| Max weight: | 2400 kg | 2560 kg |
| Front brakes: | Ventilated discs | Ventilated discs |
| Rear brakes: | Ventilated discs | Ventilated discs |
| Kerb Weight: | 1910 kg | 1930 kg |
| ABS: | yes | yes |
| Steering type: | Steering rack and pinion | Steering rack and pinion |
| Power steering: | Electric Steering | Electric Steering |
| Max. roof load: | 100 kg | |
| Minimum turning circle (turning diameter): | 11.7 m | 11.9 m |
| Permitted trailer load without brakes: | 750 kg | |
| Permitted towbar download: | 85 kg | |
| Tire size: | 225/55 R17; 245/45 R18; 275/45 R18; 245/40 R19; 275/35 R19; 245/35 R20; 275/30 R20 | 225/55 R17 |
| Wheel rims size: | 8J x 17; 8J x 18; 9J x 18; 8.5J x 19; 9J x 19; 8.5J x 20; 9J x 20 | 8.0J x 17 |