Comparison Opel Signum (facelift 2005) 1.9 CDTI (150 Hp) Automatic & Opel Vectra B (facelift 1999) 2.6 V6 (170 Hp) Automatic & Opel Astra F (facelift 1994) 1.7 TD (68 Hp)
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| Brand: | Opel | Opel | Opel |
| Model: | Signum | Vectra | Astra |
| Generation: | Signum (facelift 2005) | Vectra B (facelift 1999) | Astra F (facelift 1994) |
| Engine / modification: | 1.9 CDTI (150 Hp) Automatic | 2.6 V6 (170 Hp) Automatic | 1.7 TD (68 Hp) |
| Production start: | 2005 year | 2000 year | 1994 year |
| Production end: | 2008 year | 2002 year | 1998 year |
| Coupe type: | Hatchback | Sedan | Hatchback |
| Num. of Doors: | 5 | 4 | 3/5 |
| Num. of seats: | 5 | 5 | 5 |
| Fuel consumption / economy - urban: | 9.8 l/100 km | 6.8 l/100 km | |
| Fuel consumption / economy - extra urban: | 5.7 l/100 km | 5.1 l/100 km | |
| Fuel consumption / economy - combined: | 9.7 l/100 km | 6.3 l/100 km | |
| Fuel Type: | Diesel | Petrol (Gasoline) | Diesel |
| Drag coefficient: | 0.32 | 0.32 | |
| Fuel tank volume: | 61 l | 60 l | 52 l |
| Emission standard: | EURO II | ||
| Power: | 150 hp | 170 hp | 68 hp |
| Max power in: | 4000 rpm. | 5800 rpm. | 4500 rpm. |
| Maximum speed: | 205 km/h | 230 km/h | 164 km/h |
| Acceleration from 0 to 100 km/h: | 10.7 sec | 8.5 sec | 16 sec |
| Torque: | 320 Nm @ 2000 rpm. | 250 Nm @ 3600 rpm. | 132 Nm @ 2400 rpm. |
| Model Engine: | Z19DTH | X17DTL | |
| Engine position: | Front, transverse | Front, transverse | Front, transverse |
| Engine displacement: | 1910 cm3 | 2597 cm3 | 1700 cm3 |
| Engine oil capacity: | 4.3 l | ||
| Fuel System: | Diesel Commonrail | Multi-point injection | Diesel - Standard diesel injection (SDI) |
| Aspiration / Turbine: | Turbocharging | Turbocharging | |
| Position of cylinders: | Inline | V engine | Inline |
| Valvetrain: | DOHC | DOHC | SOHC |
| Number of cylinders: | 4 | 6 | 4 |
| Number of valves per cylinder: | 4 | 4 | 2 |
| Compression ratio: | 17.5 | 10 | 22 |
| Piston Stroke: | 90.4 mm | 79.6 mm | 79.5 mm |
| Cylinder Bore: | 82 mm | 83.2 mm | 82.5 mm |
| Wheel Drive: | Front wheel drive | Front wheel drive | Front wheel drive |
| Number of Gears (automatic transmission): | 6 | 4 | - |
| Number of Gears (manual transmission): | 5 | ||
| Length: | 4651 mm | 4495 mm | 4051 mm |
| Width: | 1798 mm | 1707 mm | 1696 mm |
| Width including mirrors: | 1841 mm | 1852 mm | |
| Height: | 1460 mm | 1425 mm | 1410 mm |
| Wheelbase: | 2830 mm | 2637 mm | 2517 mm |
| Front track: | 1524 mm | 1464 mm | 1430/1424 mm |
| Rear (Back) track: | 1525 mm | 1467 mm | 1429/1423 mm |
| Ride height(clearance): | 135 mm | ||
| Minimum volume of Luggage (trunk): | 365 l | 480 l | 360 l |
| Maximum amount of Luggage (trunk): | 1410 l | 500 l | 1200 l |
| Front suspension: | Coil spring | Coil spring | Wishbone |
| Rear suspension: | Helical spring | Helical spring | Suspension with traction connecting levers |
| Max weight: | 2130 kg | 1920 kg | 1555 kg |
| Front brakes: | Ventilated discs | Ventilated discs | Ventilated discs |
| Rear brakes: | Disc | Disc | Drum |
| Kerb Weight: | 1565 kg | 1423 kg | 1050/1070 kg |
| ABS: | yes | yes | yes |
| Steering type: | Steering rack and pinion | Steering rack and pinion | Steering rack and pinion |
| Power steering: | Hydraulic Steering | Hydraulic Steering | Hydraulic Steering |
| Minimum turning circle (turning diameter): | 10.5 m | ||
| Tire size: | 215/55 R16 | 195/65 R15 | 175/70 R13 82T; 175/65 R14 82T |
| Wheel rims size: | 6.5J x 16 | R15 | 5.5J x 13 ET49; 5.5J x 14 ET49 |