Comparison Audi A8 Long (D4,4H facelift 2013) 4.0 TFSI V8 (435 Hp) quattro Tiptronic & GMC Sierra HD Double Cab Long Box 3500 6.6 TD V8 (445 Hp) 4WD DRW Automatic
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| Brand: | Audi | GMC |
| Model: | A8 | Sierra 2500HD |
| Generation: | A8 Long (D4,4H facelift 2013) | Sierra HD Double Cab Long Box |
| Engine / modification: | 4.0 TFSI V8 (435 Hp) quattro Tiptronic | 3500 6.6 TD V8 (445 Hp) 4WD DRW Automatic |
| Production start: | 2013 year | 2018 year |
| Production end: | 2017 year | |
| Coupe type: | Sedan | Pick-up |
| Num. of Doors: | 4 | 4 |
| Num. of seats: | 5 | 5 |
| Fuel consumption / economy - urban: | 12.8 l/100 km | |
| Fuel consumption / economy - extra urban: | 7.2 l/100 km | |
| Fuel consumption / economy - combined: | 9.2 l/100 km | |
| Fuel Type: | Petrol (Gasoline) | Diesel |
| Drag coefficient: | 0.27 | |
| Fuel tank volume: | 82 l | 136 l |
| Emission standard: | Euro 6 | |
| CO2 emissions: | 216 g/km | |
| Power: | 435 hp | 445 hp |
| Max power in: | 5100-6000 rpm. | 2800 rpm. |
| Maximum speed: | 250 km/h | |
| Acceleration from 0 to 100 km/h: | 4.6 sec | |
| Torque: | 600 Nm @ 1500-5000 rpm. | 1234 Nm @ 1600 rpm. |
| Model Engine: | CTGA | DURAMAX L5P |
| Engine position: | Front, longitudinal | Front, longitudinal |
| Engine displacement: | 3993 cm3 | 6588 cm3 |
| Engine oil capacity: | 8.7 l | 9.5 l |
| Coolant: | 15.0 l | |
| Fuel System: | Direct injection | Diesel Commonrail |
| Aspiration / Turbine: | Turbo / Intercooler (Turbocharging / Intercooler) | Turbocharger |
| Position of cylinders: | V engine | V engine |
| Valvetrain: | DOHC | |
| Number of cylinders: | 8 | 8 |
| Number of valves per cylinder: | 4 | 4 |
| Compression ratio: | 10.1 | 16 |
| Piston Stroke: | 89 mm | 99 mm |
| Cylinder Bore: | 84.5 mm | 103 mm |
| Wheel Drive: | All wheel drive (4x4) | All wheel drive (4x4) |
| Number of Gears (automatic transmission): | 8 Tiptronic | 6 |
| Length: | 5265 mm | 6322 mm |
| Width: | 1949 mm | |
| Width including mirrors: | 2111 mm | 2045 mm |
| Height: | 1471 mm | 1978 mm |
| Wheelbase: | 3122 mm | 4017 mm |
| Front track: | 1644 mm | |
| Rear (Back) track: | 1635 mm | |
| Front overhang: | 1000 mm | |
| Rear overhang: | 1143 mm | |
| Minimum volume of Luggage (trunk): | 520 l | |
| Maximum amount of Luggage (trunk): | 2160 l | |
| Front suspension: | Multi-link suspension | Torsion |
| Rear suspension: | Independent on trapezoidal lever | The spring |
| Max weight: | 2625 kg | 5908 kg |
| Front brakes: | Ventilated discs | Ventilated discs |
| Rear brakes: | Ventilated discs | Ventilated discs |
| Kerb Weight: | 1975 kg | 3584 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 | |
| Permitted trailer load with brakes (8%): | 2300 kg | |
| Minimum turning circle (turning diameter): | 12.7 m | |
| Permitted trailer load with brakes (12%): | 2300 kg | 9071 kg |
| Permitted trailer load without brakes: | 750 kg | |
| Permitted towbar download: | 95 kg | |
| Tire size: | 235/55 R18 | 245/75 R17; 265/70 R17; 265/70 R18; 265/60 R20 |
| Wheel rims size: | 8J x 18 | 7J x 17; 7.5J x 17; 8J x 18; 8J x 20 |