Comparison Opel Signum (facelift 2005) 3.0 V6 CDTI (184 Hp) Automatic & Opel Vectra A 1.8i CAT (90 Hp)
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| Brand: | Opel | Opel |
| Model: | Signum | Vectra |
| Generation: | Signum (facelift 2005) | Vectra A |
| Engine / modification: | 3.0 V6 CDTI (184 Hp) Automatic | 1.8i CAT (90 Hp) |
| Production start: | 2005 year | 1990 year |
| Production end: | 2008 year | 1992 year |
| Coupe type: | Hatchback | Sedan |
| Num. of Doors: | 5 | 4 |
| Num. of seats: | 5 | 5 |
| Fuel consumption / economy - urban: | 10.3 l/100 km | 10.2 l/100 km |
| Fuel consumption / economy - extra urban: | 5.4 l/100 km | 5.5 l/100 km |
| Fuel consumption / economy - combined: | 7.2 l/100 km | 7.1 l/100 km |
| Fuel Type: | Diesel | Petrol (Gasoline) |
| Drag coefficient: | 0.32 | 0.29 |
| Fuel tank volume: | 60 l | 61 l |
| Power: | 184 hp | 90 hp |
| Max power in: | 4000 rpm. | 5400 rpm. |
| Maximum speed: | 219 km/h | 183 km/h |
| Acceleration from 0 to 100 km/h: | 9.8 sec | 12.5 sec |
| Torque: | 370 Nm @ 1900 rpm. | 145 Nm/3000 rpm. |
| Model Engine: | Z30DT | |
| Engine position: | Front, transverse | Front, transverse |
| Engine displacement: | 2958 cm3 | 1796 cm3 |
| Engine oil capacity: | 7.5 l | |
| Fuel System: | Diesel Commonrail | Mono-point injection |
| Aspiration / Turbine: | Turbocharging | |
| Position of cylinders: | V engine | Inline |
| Valvetrain: | DOHC | OHC |
| Number of cylinders: | 6 | 4 |
| Number of valves per cylinder: | 4 | 2 |
| Compression ratio: | 18.5 | 9.2 |
| Piston Stroke: | 82 mm | 79.5 mm |
| Cylinder Bore: | 87.5 mm | 84.8 mm |
| Wheel Drive: | Front wheel drive | Front wheel drive |
| Number of Gears (automatic transmission): | 5 | 4 |
| Number of Gears (manual transmission): | 5 | |
| Length: | 4651 mm | 4432 mm |
| Width: | 1798 mm | 1706 mm |
| Height: | 1460 mm | 1400 mm |
| Wheelbase: | 2830 mm | 2600 mm |
| Front track: | 1535 mm | 1437 mm |
| Rear (Back) track: | 1525 mm | 1432 mm |
| Minimum volume of Luggage (trunk): | 365 l | 530 l |
| Maximum amount of Luggage (trunk): | 1410 l | 840 l |
| Front suspension: | Coil spring | Helical spring |
| Rear suspension: | Helical spring | Helical spring |
| Max weight: | 2185 kg | 1610 kg |
| Front brakes: | Ventilated discs | Ventilated discs |
| Rear brakes: | Disc | Drum |
| Kerb Weight: | 1670 kg | 1060 kg |
| ABS: | yes | yes |
| Steering type: | Steering rack and pinion | |
| Power steering: | Hydraulic Steering | Hydraulic Steering |
| Tire size: | 215/55 R16 | 175/70 R14 |
| Wheel rims size: | 6.5J x 16 | R14 |