Comparison Buick Riviera 3.8 i V6 Supercharged (228 Hp) & Mercedes-Benz R-class (W251) Long R 500 V6 (388 Hp) 4MATIC G-TRONIC
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| Brand: | Buick | Mercedes-Benz |
| Model: | Riviera | R-class |
| Generation: | Riviera | R-class (W251) Long |
| Engine / modification: | 3.8 i V6 Supercharged (228 Hp) | R 500 V6 (388 Hp) 4MATIC G-TRONIC |
| Production start: | 1994 year | 2008 year |
| Production end: | 1997 year | 2010 year |
| Coupe type: | Coupe | Combi |
| Num. of Doors: | 2 | 5 |
| Num. of seats: | 5 | 5 |
| Fuel consumption / economy - urban: | 18 l/100 km | 18.2-18.4 l/100 km |
| Fuel consumption / economy - extra urban: | 10 l/100 km | 9.8-10.0 l/100 km |
| Fuel consumption / economy - combined: | 12.9-13.1 l/100 km | |
| Fuel Type: | Petrol (Gasoline) | Petrol (Gasoline) |
| Fuel tank volume: | 73 l | 80 l |
| Emission standard: | EURO V | |
| CO2 emissions: | 306 g/km | |
| Power: | 228 hp | 388 hp |
| Max power in: | 5000 rpm. | 6000 rpm. |
| Maximum speed: | 220 km/h | 250 km/h |
| Acceleration from 0 to 100 km/h: | 6.3 sec | |
| Torque: | 373 Nm/3200 rpm. | 530 Nm @ 2800-4800 rpm. |
| Engine position: | Front, transverse | Front, longitudinal |
| Engine displacement: | 3791 cm3 | 5461 cm3 |
| Fuel System: | Multi-point injection | Multi-point injection |
| Aspiration / Turbine: | Mechanical supercharging (Compressor) | |
| Position of cylinders: | V engine | V engine |
| Valvetrain: | - | |
| Number of cylinders: | 6 | 8 |
| Number of valves per cylinder: | 2 | 4 |
| Compression ratio: | 9.4 | 10.7 |
| Piston Stroke: | 86.4 mm | 90.5 mm |
| Cylinder Bore: | 96.5 mm | 98 mm |
| Wheel Drive: | Front wheel drive | All wheel drive (4x4) |
| Number of Gears (automatic transmission): | 4 | 7G-TRONIC |
| Length: | 5263 mm | 5157 mm |
| Width: | 1906 mm | 1922 mm |
| Height: | 1386 mm | 1674 mm |
| Wheelbase: | 2890 mm | 3215 mm |
| Front track: | 1588 mm | 1661 mm |
| Rear (Back) track: | 1589 mm | 1651 mm |
| Minimum volume of Luggage (trunk): | 493 l | |
| Maximum amount of Luggage (trunk): | 2385 l | |
| Front suspension: | The depreciated rack | Double wishbone |
| Rear suspension: | Double wishbone | Independent, spring multi-link with stabilizer |
| Max weight: | 2920 kg | |
| Front brakes: | Ventilated discs | Ventilated discs |
| Rear brakes: | Disc | Ventilated discs |
| Kerb Weight: | 1696 kg | 2265 kg |
| ABS: | yes | 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): | 12.4 m | |
| Permitted trailer load with brakes (12%): | 2100 kg | |
| Permitted trailer load without brakes: | 750 kg | |
| Tire size: | 225/60 R16 S | 255/55 R19 W |
| Wheel rims size: | R19 |