Comparison Aston Martin DB9 Coupe 5.9 i V12 48V (456 Hp) Automatic & Alpina B6 Coupe (E63) 4.4i V8(500 Hp) & Dadi Smoothing 2.4 i (125 Hp)
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| Brand: | Aston Martin | Alpina | Dadi |
| Model: | DB9 | B6 | Smoothing |
| Generation: | DB9 Coupe | B6 Coupe (E63) | Smoothing |
| Engine / modification: | 5.9 i V12 48V (456 Hp) Automatic | 4.4i V8(500 Hp) | 2.4 i (125 Hp) |
| Production start: | 2004 year | 2005 year | 2007 year |
| Production end: | 2016 year | 2008 year | |
| Coupe type: | Coupe | Coupe | Pick-up |
| Num. of Doors: | 2 | 2 | 4 |
| Num. of seats: | 2+2 | 4 | 4 |
| Fuel consumption / economy - urban: | 24 l/100 km | ||
| Fuel consumption / economy - extra urban: | 12 l/100 km | 12.3 l/100 km | |
| Fuel Type: | Petrol (Gasoline) | Petrol (Gasoline) | Petrol (Gasoline) |
| Fuel tank volume: | 85 l | 70 l | |
| Emission standard: | Euro 4 | ||
| Power: | 456 hp | 500 hp | 125 hp |
| Max power in: | 6000 rpm. | 5500 rpm. | 5250 rpm. |
| Maximum speed: | 300 km/h | 315 km/h | 120 km/h |
| Acceleration from 0 to 100 km/h: | 5.1 sec | 4.6 sec | |
| Torque: | 570 Nm/5000 rpm. | 700 Nm @ 4250 rpm. | 190 Nm |
| Model Engine: | 4G64 Mitsubishi | ||
| Engine position: | Front, longitudinal | Front, longitudinal | Front, longitudinal |
| Engine displacement: | 5935 cm3 | 4398 cm3 | 2351 cm3 |
| Fuel System: | Multi-point injection | Multi-point injection | Multi-point injection |
| Position of cylinders: | V engine | V engine | Inline |
| Valvetrain: | DOHC | DOHC | OHC |
| Number of cylinders: | 12 | 8 | 4 |
| Number of valves per cylinder: | 4 | 4 | 4 |
| Compression ratio: | 10.3 | 9 | 9 |
| Piston Stroke: | 79.5 mm | 82.7 mm | |
| Cylinder Bore: | 89 mm | 92 mm | |
| Wheel Drive: | Rear wheel drive | Rear wheel drive | Part time 4x4 |
| Number of Gears (automatic transmission): | 6 | 6 | |
| Number of Gears (manual transmission): | 5 | ||
| Length: | 4697 mm | 4820 mm | 5035 mm |
| Width: | 1875 mm | 1855 mm | 1740 mm |
| Height: | 1318 mm | 1371 mm | 1680 mm |
| Wheelbase: | 2740 mm | 2780 mm | |
| Front track: | 1568 mm | 1558 mm | 1460 mm |
| Rear (Back) track: | 1562 mm | 1598 mm | 1440 mm |
| Maximum amount of Luggage (trunk): | 175 l | 450 l | |
| Front suspension: | Double wishbone | Independent, Spring McPherson, with stabilizer | |
| Rear suspension: | Double wishbone | Helical spring | |
| Max weight: | 2190 kg | 2285 kg | |
| Front brakes: | Ventilated discs | Ventilated discs | Disc |
| Rear brakes: | Ventilated discs | Disc | Drum |
| Kerb Weight: | 1760 kg | 1720 kg | 1460 kg |
| ABS: | yes | yes | yes |
| Steering type: | Steering rack and pinion | ||
| Power steering: | Hydraulic Steering | ||
| Minimum turning circle (turning diameter): | 12 m | ||
| Tire size: | 235/40 ZR19; 275/35 ZR19 | 245/45R18 | 225/75 R15 |
| Wheel rims size: | 8.5-9.5x19 |