Comparison Mercedes-Benz R-class (W251) R 350 CDI V6 (224 Hp) 4MATIC G-TRONIC & Porsche 928 4.5 V8 (219 Hp)
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| Brand: | Mercedes-Benz | Porsche |
| Model: | R-class | 928 |
| Generation: | R-class (W251) | 928 |
| Engine / modification: | R 350 CDI V6 (224 Hp) 4MATIC G-TRONIC | 4.5 V8 (219 Hp) |
| Production start: | 2009 year | 1977 year |
| Production end: | 2010 year | 1995 year |
| Coupe type: | Combi | Coupe |
| Num. of Doors: | 5 | 2 |
| Num. of seats: | 5-7 | 2+2 |
| Fuel consumption / economy - combined: | 9.3 l/100 km | |
| Fuel Type: | Diesel | Petrol (Gasoline) |
| Fuel tank volume: | 80 l | 86 l |
| Emission standard: | Euro 5 | |
| CO2 emissions: | 246 g/km | |
| Power: | 224 hp | 219 hp |
| Max power in: | 5250 rpm. | |
| Maximum speed: | 222 km/h | |
| Acceleration from 0 to 100 km/h: | 8.7 sec | 7.7 sec |
| Torque: | 510 Nm | 344 Nm @ 3600 rpm. |
| Model Engine: | OM 642.950 | |
| Engine position: | Front, longitudinal | Front, longitudinal |
| Engine displacement: | 2987 cm3 | 4474 cm3 |
| Engine oil capacity: | 8.5 l | 7.5 l |
| Coolant: | 10.1-13 l | 16 l |
| Fuel System: | Diesel Commonrail | |
| Maximum engine speed: | 4500 rpm. | |
| Aspiration / Turbine: | Turbocharger / Intercooler | |
| Position of cylinders: | V engine | |
| Valvetrain: | DOHC | |
| Number of cylinders: | 6 | 8 |
| Number of valves per cylinder: | 4 | 4 |
| Compression ratio: | 16.5 | 8.5 |
| Piston Stroke: | 92 mm | 78.9 mm |
| Cylinder Bore: | 83 mm | 95 mm |
| Wheel Drive: | All wheel drive (4x4) | Rear wheel drive |
| Number of Gears (automatic transmission): | 7G-TRONIC | |
| Number of Gears (manual transmission): | 5 | |
| Length: | 4922 mm | 4447 mm |
| Width: | 1922 mm | 1836 mm |
| Height: | 1659 mm | 1313 mm |
| Wheelbase: | 2980 mm | 2500 mm |
| Front track: | 1545 mm | |
| Rear (Back) track: | 1514 mm | |
| Minimum volume of Luggage (trunk): | 550 l | |
| Maximum amount of Luggage (trunk): | 1950 l | |
| Front suspension: | Double wishbone | Double wishbone |
| Rear suspension: | Independent, spring multi-link with stabilizer | Double wishbone |
| Max weight: | 2840 kg | 1870 kg |
| Front brakes: | Disc | Ventilated discs |
| Rear brakes: | Disc | Disc |
| Kerb Weight: | 2250 kg | 1500 kg |
| ABS: | yes | |
| Steering type: | Steering rack and pinion | Steering rack and pinion |
| Power steering: | Hydraulic Steering | Hydraulic Steering |
| Max. roof load: | 100 kg | |
| Minimum turning circle (turning diameter): | 11.5 m | |
| Permitted trailer load with brakes (12%): | 2100 kg | |
| Permitted trailer load without brakes: | 750 kg | |
| Tire size: | 235/65 R17 | Front wheel tires: 225/50 VR16 |
| Wheel rims size: | 7.5J x 17 | Front wheel rims: 7J x 16 |