Comparison Audi A6 (4F,C6 facelift 2008) 3.0 TFSI V6 (290 Hp) quattro Tiptronic & Pininfarina H2 Speed (653 Hp) Electric-Hydrogen & Citroen CX II Prestige 25 Turbo 2 (168 Hp)
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| Brand: | Audi | Pininfarina | Citroen |
| Model: | A6 | H2 | CX |
| Generation: | A6 (4F,C6 facelift 2008) | H2 Speed | CX II |
| Engine / modification: | 3.0 TFSI V6 (290 Hp) quattro Tiptronic | (653 Hp) Electric-Hydrogen | Prestige 25 Turbo 2 (168 Hp) |
| Production start: | 2008 year | 2018 year | 1985 year |
| Production end: | 2011 year | 1986 year | |
| Coupe type: | Sedan | Coupe | Hatchback |
| Num. of Doors: | 4 | 2 | 5 |
| Num. of seats: | 5 | 2 | 5 |
| Fuel consumption / economy - urban: | 13.2 l/100 km | 14.1 l/100 km | |
| Fuel consumption / economy - extra urban: | 7.1 l/100 km | 8.0 l/100 km | |
| Fuel consumption / economy - combined: | 9.4 l/100 km | ||
| Fuel Type: | Petrol (Gasoline) | Hydrogen / electricity | Petrol (Gasoline) |
| Drag coefficient: | 0.29 | 0.34 | |
| Fuel tank volume: | 80 l | 68 l | |
| Emission standard: | Euro 5 | ||
| CO2 emissions: | 219 g/km | ||
| Power: | 290 hp | 653 hp | 168 hp |
| Max power in: | 4850-6800 rpm. | 13000 rpm. | 5000 rpm. |
| Maximum speed: | 250 km/h | 300 km/h | |
| Acceleration from 0 to 100 km/h: | 5.9 sec | 3.4 sec | |
| Torque: | 420 Nm @ 2500-4850 rpm. | 294 Nm @ 3250 rpm. | |
| Model Engine: | CAJA | M25/662 | |
| Engine position: | Front, longitudinal | Front, transverse | |
| Engine displacement: | 2995 cm3 | 2500 cm3 | |
| Engine oil capacity: | 6.5 l | 5.3 l | |
| Coolant: | 9.6 l | 13.0 l | |
| Fuel System: | Direct injection | Multi-point injection | |
| Aspiration / Turbine: | Turbo / Intercooler (Turbocharging / Intercooler) | Turbocharging | |
| Position of cylinders: | V engine | Inline | |
| Valvetrain: | DOHC | ||
| Number of cylinders: | 6 | 4 | |
| Number of valves per cylinder: | 4 | 2 | |
| Compression ratio: | 10.3 | 7.75 | |
| Piston Stroke: | 89 mm | 92 mm | |
| Cylinder Bore: | 84.5 mm | 93 mm | |
| Electric motor power: | 653 | ||
| System power: | 653 Hp @ 1 hp/ rpm. | ||
| Wheel Drive: | All wheel drive (4x4) | Front wheel drive | |
| Number of Gears (automatic transmission): | 6 Tiptronic | ||
| Number of Gears (manual transmission): | 5 | ||
| Length: | 4927 mm | 4730 mm | 4900 mm |
| Width: | 1855 mm | 1956 mm | 1770 mm |
| Width including mirrors: | 2030 mm | ||
| Height: | 1459 mm | 1113 mm | 1375 mm |
| Wheelbase: | 2843 mm | 2968 mm | 3095 mm |
| Front track: | 1612 mm | 1522 mm | |
| Rear (Back) track: | 1618 mm | 1368 mm | |
| Ride height(clearance): | 160 mm | ||
| Front overhang: | 994 mm | 987 mm | |
| Rear overhang: | 1090 mm | 775 mm | |
| Minimum volume of Luggage (trunk): | 546 l | 485 l | |
| Maximum amount of Luggage (trunk): | 546 l | 507 l | |
| Front suspension: | Independent multi-link | Hydro-pneumatic element | |
| Rear suspension: | Independent on trapezoidal lever | Hydro-pneumatic element | |
| Max weight: | 2305 kg | 1920 kg | |
| Front brakes: | Ventilated discs | Ventilated discs | |
| Rear brakes: | Disc | Disc | |
| Kerb Weight: | 1725 kg | 1430 kg | 1480 kg |
| ABS: | yes | ||
| Steering type: | Steering rack and pinion | Steering rack and pinion | |
| Power steering: | Hydraulic Steering | ||
| Max. roof load: | 100 kg | 80 kg | |
| Permitted trailer load with brakes (8%): | 2100 kg | ||
| Minimum turning circle (turning diameter): | 13.40 m | ||
| Permitted trailer load with brakes (12%): | 1900 kg | 1300 kg | |
| Permitted trailer load without brakes: | 750 kg | 740 kg | |
| Permitted towbar download: | 85 kg | 100 kg | |
| Tire size: | 225/50 R17 | 30/68 R18; 31/71 R18 | |
| Wheel rims size: | 7.5J x 16 | 12J x 18; 13J x 18 |