Comparison Mercedes-Benz R-class (W251) R 300 V6 (231 Hp) G-TRONIC & Audi TT Roadster (8S) 2.0 TFSI (230 Hp) quattro S tronic & Mercedes-Benz W121 Sedan (facelift 1959) 190 b (80 Hp)
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| Brand: | Mercedes-Benz | Audi | Mercedes-Benz |
| Model: | R-class | TT | Ponton |
| Generation: | R-class (W251) | TT Roadster (8S) | W121 Sedan (facelift 1959) |
| Engine / modification: | R 300 V6 (231 Hp) G-TRONIC | 2.0 TFSI (230 Hp) quattro S tronic | 190 b (80 Hp) |
| Production start: | 2009 year | 2014 year | 1959 year |
| Production end: | 2014 year | 2018 year | 1961 year |
| Coupe type: | Combi | Roadster | Sedan |
| Num. of Doors: | 5 | 2 | 5 |
| Num. of seats: | 5 | 2 | 5 |
| Fuel consumption / economy - urban: | 15.2-15.4 l/100 km | 8.5 l/100 km | |
| Fuel consumption / economy - extra urban: | 8.8-9.0 l/100 km | 5.6 l/100 km | |
| Fuel consumption / economy - combined: | 11.1-11.3 l/100 km | 6.7 l/100 km | 11 l/100 km |
| Fuel Type: | Petrol (Gasoline) | Petrol (Gasoline) | Petrol (Gasoline) |
| Drag coefficient: | 0.32 | ||
| Fuel tank volume: | 80 l | 55 l | 56 l |
| Emission standard: | Euro 5 | Euro 6 | |
| CO2 emissions: | 260 g/km | 154 g/km | |
| Power: | 231 hp | 230 hp | 80 hp |
| Max power in: | 6000 rpm. | 4500-6200 rpm. | 4800 rpm. |
| Maximum speed: | 222 km/h | 250 km/h | 145 km/h |
| Acceleration from 0 to 100 km/h: | 9.7 sec | 5.6 sec | 19 sec |
| Torque: | 300 Nm @ 2500-5000 rpm. | 370 Nm @ 1600-4300 rpm. | 140 Nm @ 2800 rpm. |
| Model Engine: | M 272.945 | CHHC | M 121 B I b / 121.920 |
| Engine position: | Front, longitudinal | Front, transverse | Front, longitudinal |
| Engine displacement: | 2996 cm3 | 1984 cm3 | 1897 cm3 |
| Engine oil capacity: | 8 l | 5.7 l | |
| Coolant: | 10.1-13 l | ||
| Fuel System: | Multi-point injection | Direct injection | Carburettor |
| Aspiration / Turbine: | Turbocharging | ||
| Position of cylinders: | V engine | Inline | Inline |
| Valvetrain: | DOHC | SOHC | |
| Number of cylinders: | 6 | 4 | 4 |
| Number of valves per cylinder: | 4 | 2 | |
| Compression ratio: | 11.3 | 9.6 | 8.5 |
| Piston Stroke: | 92.8 mm | 83.6 mm | |
| Cylinder Bore: | 82.5 mm | 85 mm | |
| Wheel Drive: | Rear wheel drive | All wheel drive (4x4) | Rear wheel drive |
| Number of Gears (automatic transmission): | 7G-TRONIC | 6 S tronic | |
| Number of Gears (manual transmission): | 4 | ||
| Length: | 4922 mm | 4177 mm | 4500 mm |
| Width: | 1922 mm | 1832 mm | 1740 mm |
| Width including mirrors: | 1966 mm | ||
| Height: | 1674 mm | 1355 mm | 1560 mm |
| Wheelbase: | 2980 mm | 2505 mm | 2650 mm |
| Front track: | 1661 mm | 1572 mm | 1430 mm |
| Rear (Back) track: | 1651 mm | 1552 mm | 1475 mm |
| Front overhang: | 884 mm | ||
| Rear overhang: | 788 mm | ||
| Minimum volume of Luggage (trunk): | 550 l | 280 l | |
| Maximum amount of Luggage (trunk): | 1950 l | ||
| Front suspension: | Double wishbone | Independent, Spring McPherson, with stabilizer | |
| Rear suspension: | Independent, spring multi-link with stabilizer | Independent, spring | |
| Max weight: | 2790 kg | 1745 kg | 1650 kg |
| Front brakes: | Ventilated discs | Ventilated discs | Drum |
| Rear brakes: | Disc | Disc | Drum |
| Kerb Weight: | 2130 kg | 1500 kg | 1200 kg |
| ABS: | yes | yes | |
| Steering type: | Steering rack and pinion | Steering rack and pinion | Cone worm with recirculation balls |
| Power steering: | Hydraulic Steering | Electric Steering | |
| Minimum turning circle (turning diameter): | 11.8 m | 10.96 m | |
| Permitted trailer load with brakes (12%): | 2100 kg | ||
| Permitted trailer load without brakes: | 750 kg | ||
| Tire size: | 255/55 R18 | 225/50 R17 | |
| Wheel rims size: | R18 | 8.0J x 17 |