Comparison Audi TT RS Roadster (8J, facelift 2010) 2.5 TFSI (340 Hp) quattro & GMC Sierra 2500HD III (GMT900, facelift 2011) Crew Cab Standard Box 6.0 V8 (301 Hp) Automatic CNG
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| Brand: | Audi | GMC |
| Model: | TT | Sierra 2500HD |
| Generation: | TT RS Roadster (8J, facelift 2010) | Sierra 2500HD III (GMT900, facelift 2011) Crew Cab Standard Box |
| Engine / modification: | 2.5 TFSI (340 Hp) quattro | 6.0 V8 (301 Hp) Automatic CNG |
| Production start: | 2011 year | 2013 year |
| Production end: | 2014 year | 2014 year |
| Coupe type: | Roadster | Pick-up |
| Powertrain Architecture: | Internal Combustion engine | |
| Num. of Doors: | 2 | 2 |
| Num. of seats: | 2 | 5 |
| Fuel consumption / economy - urban: | 12.8 l/100 km | |
| Fuel consumption / economy - extra urban: | 7.0 l/100 km | |
| Fuel consumption / economy - combined: | 9.1 l/100 km | |
| Fuel Type: | Petrol (Gasoline) | Petrol / CNG |
| Drag coefficient: | 0.32 | |
| Fuel tank volume: | 60 l | 136 l |
| Emission standard: | Euro 5 | |
| CO2 emissions: | 212 g/km | |
| Power: | 340 hp | 301 hp |
| Max power in: | 5400-6500 rpm. | 5000 rpm. |
| Maximum speed: | 250 km/h | |
| Acceleration from 0 to 100 km/h: | 4.7 sec | |
| Torque: | 450 Nm @ 1600-5300 rpm. | 452 Nm @ 4200 rpm. |
| Model Engine: | CEPA | Vortec LC8 |
| Engine position: | Front, transverse | |
| Engine displacement: | 2480 cm3 | 5967 cm3 |
| Engine oil capacity: | 6.5 l | 5.7 l |
| Coolant: | 15.5 l | |
| Fuel System: | Direct injection | |
| Maximum engine speed: | 6000 rpm. | |
| CNG cylinder capacity: | 67 kg | |
| Aspiration / Turbine: | Turbo / Intercooler (Turbocharging / Intercooler) | Naturally aspirated engine |
| Position of cylinders: | Inline | |
| Valvetrain: | DOHC | OHV, VVT |
| Number of cylinders: | 5 | 8 |
| Number of valves per cylinder: | 4 | 2 |
| Compression ratio: | 10 | 9.6 |
| Piston Stroke: | 92.8 mm | 92 mm |
| Cylinder Bore: | 82.5 mm | 101.6 mm |
| Wheel Drive: | All wheel drive (4x4) | Rear wheel drive |
| Number of Gears (manual transmission): | 6 | |
| Length: | 4198 mm | 6101 mm |
| Width: | 1842 mm | |
| Width including mirrors: | 1952 mm | 2032 mm |
| Height: | 1348 mm | 1958 mm |
| Wheelbase: | 2468 mm | 3904 mm |
| Front track: | 1555 mm | 1748 mm |
| Rear (Back) track: | 1546 mm | 1709 mm |
| Ride height(clearance): | 213 mm | |
| Front overhang: | 911 mm | |
| Rear overhang: | 819 mm | |
| Minimum volume of Luggage (trunk): | 250 l | |
| Front suspension: | Independent, Spring McPherson, with stabilizer | |
| Rear suspension: | Independent, spring multi-link with stabilizer | |
| Max weight: | 1830 kg | |
| Front brakes: | Ventilated discs | |
| Rear brakes: | Ventilated discs | |
| Kerb Weight: | 1510 kg | |
| ABS: | yes | |
| Steering type: | Steering rack and pinion | Cone worm with recirculation balls |
| Power steering: | Electric Steering | |
| Minimum turning circle (turning diameter): | 10.7 m | 15.4 m |
| Tire size: | 245/40 R18 | 245/75 R17; 265/70 R17; 265/70 R18; 265/60 R20 |
| Wheel rims size: | 9J x 18 | 7.5J x 17; 8J x 18; 8.5J x 20 |