Comparison Audi A6 Limousine (4G, C7 facelift 2016) 3.0 TDI competition (326 Hp) quattro Tiptronic & Buick Regal II Coupe (facelift 1981) 3.8 V6 (177 Hp) Automatic
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| Brand: | Audi | Buick |
| Model: | A6 | Regal |
| Generation: | A6 Limousine (4G, C7 facelift 2016) | Regal II Coupe (facelift 1981) |
| Engine / modification: | 3.0 TDI competition (326 Hp) quattro Tiptronic | 3.8 V6 (177 Hp) Automatic |
| Production start: | 2016 year | 1981 year |
| Production end: | 1987 year | |
| Coupe type: | Sedan | Coupe |
| Num. of Doors: | 4 | 2 |
| Num. of seats: | 5 | 5 |
| Fuel consumption / economy - urban: | 7.3-7.5 l/100 km | 13.1 l/100 km |
| Fuel consumption / economy - extra urban: | 5.3-5.5 l/100 km | 9.4 l/100 km |
| Fuel consumption / economy - combined: | 6.0-6.2 l/100 km | 11.2 l/100 km |
| Fuel Type: | Diesel | Petrol (Gasoline) |
| Drag coefficient: | 0.28 | 0.45 |
| Fuel tank volume: | 73 l | 68 l |
| Emission standard: | EURO VI | |
| CO2 emissions: | 159-164 g/km | |
| Power: | 326 hp | 177 hp |
| Max power in: | 4000-4500 rpm. | 4000 rpm. |
| Maximum speed: | 250 km/h | |
| Acceleration from 0 to 100 km/h: | 5.0 sec | |
| Torque: | 650 Nm/1400-2800 rpm. | 373 Nm @ 2600 rpm. |
| Model Engine: | LD5/LC6 | |
| Engine position: | Front, longitudinal | Front, longitudinal |
| Engine displacement: | 2967 cm3 | 3791 cm3 |
| Engine oil capacity: | 8.0 l | 4.7 l |
| Coolant: | 11.5 l | 12.5 l |
| Fuel System: | Diesel Commonrail | Carburettor |
| Aspiration / Turbine: | Turbo / Intercooler (Turbocharging / Intercooler) | Turbocharger |
| Position of cylinders: | V engine | V engine |
| Valvetrain: | DOHC | OHV |
| Number of cylinders: | 6 | 6 |
| Number of valves per cylinder: | 4 | 2 |
| Compression ratio: | 15.5 | 8 |
| Piston Stroke: | 91.4 mm | 86.36 mm |
| Cylinder Bore: | 83 mm | 96.52 mm |
| Wheel Drive: | All wheel drive (4x4) | Rear wheel drive |
| Number of Gears (automatic transmission): | 8 tiptronic | 3 Hydramatic |
| Length: | 4932 mm | 5095 mm |
| Width: | 1874 mm | 1819 mm |
| Width including mirrors: | 2086 mm | |
| Height: | 1455 mm | 1374 mm |
| Wheelbase: | 2912 mm | 2746 mm |
| Front track: | 1627 mm | 1486 mm |
| Rear (Back) track: | 1618 mm | 1468 mm |
| Front overhang: | 925 mm | |
| Rear overhang: | 1095 mm | |
| Minimum volume of Luggage (trunk): | 530 l | 459 l |
| Maximum amount of Luggage (trunk): | 995 l | |
| Front suspension: | Multi-link suspension | Independent, spring |
| Rear suspension: | Independent on trapezoidal lever | Suspension De-Dion |
| Max weight: | 2475 kg | |
| Front brakes: | Ventilated discs | Ventilated discs |
| Rear brakes: | Ventilated discs | Drum |
| Kerb Weight: | 1865 kg | 1503 kg |
| ABS: | yes | |
| Steering type: | Steering rack and pinion | Cone worm with recirculation balls |
| Power steering: | Electric Steering | |
| Max. roof load: | 100 kg | |
| Permitted trailer load with brakes (8%): | 2100 kg | |
| Minimum turning circle (turning diameter): | 11.9 m | 12.8 m |
| Permitted trailer load with brakes (12%): | 2100 kg | |
| Permitted trailer load without brakes: | 750 kg | |
| Permitted towbar download: | 85 kg | |
| Tire size: | 255/35 R20 | 205/70 R14 |
| Wheel rims size: | 8.5 J x 20 | R14 |