2006 Infiniti QX56 vs. 2003 Opel Vectra
To start off, 2006 Infiniti QX56 is newer by 3 year(s). Which means there will be less support and parts availability for 2003 Opel Vectra. In addition, the cost of maintenance, including insurance, on 2003 Opel Vectra would be higher. At 5,555 cc (8 cylinders), 2006 Infiniti QX56 is equipped with a bigger engine. In terms of performance, 2006 Infiniti QX56 (315 HP @ 4900 RPM) has 141 more horse power than 2003 Opel Vectra. (174 HP @ 4000 RPM). In normal driving conditions, 2006 Infiniti QX56 should accelerate faster than 2003 Opel Vectra. With that said, vehicle weight also plays an important factor in acceleration. 2003 Opel Vectra weights approximately 444 kg more than 2006 Infiniti QX56.
Because 2006 Infiniti QX56 is four wheel drive (4WD), it will have significant more traction and grip than 2003 Opel Vectra. In wet, icy, snow, or gravel driving conditions, 2006 Infiniti QX56 will offer significantly more control. With that said, do keep in mind that many other factors such as speed and the wear on your tires can also have significant impact on traction and control. Let's talk about torque, 2006 Infiniti QX56 (529 Nm @ 3600 RPM) has 159 more torque (in Nm) than 2003 Opel Vectra. (370 Nm @ 1900 RPM). This means 2006 Infiniti QX56 will have an easier job in driving up hills or pulling heavy equipment than 2003 Opel Vectra.
Compare all specifications:
| 2006 Infiniti QX56 | 2003 Opel Vectra | |
| Make | Infiniti | Opel |
| Model | QX56 | Vectra |
| Year Released | 2006 | 2003 |
| Engine Position | Front | Front |
| Engine Size | 5555 cc | 2958 cc |
| Engine Cylinders | 8 cylinders | 6 cylinders |
| Engine Type | V | V |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 315 HP | 174 HP |
| Engine RPM | 4900 RPM | 4000 RPM |
| Torque | 529 Nm | 370 Nm |
| Torque RPM | 3600 RPM | 1900 RPM |
| Engine Bore Size | 98 mm | 87.5 mm |
| Engine Stroke Size | 92 mm | 82 mm |
| Engine Compression Ratio | 9.8:1 | 18.5:1 |
| Drive Type | 4WD | Front |
| Transmission Type | Automatic | Automatic |
| Number of Seats | 7 seats | 5 seats |
| Number of Doors | 5 doors | 5 doors |
| Vehicle Weight | 1320 kg | 1764 kg |
| Vehicle Length | 5260 mm | 4830 mm |
| Vehicle Width | 2010 mm | 1800 mm |
| Vehicle Height | 1980 mm | 1510 mm |
| Wheelbase Size | 3140 mm | 2840 mm |
| Fuel Consumption Highway | 13.1 L/100km | 5.8 L/100km |
| Fuel Consumption City | 18.1 L/100km | 11 L/100km |
| Fuel Consumption Overall | 15.7 L/100km | 7.7 L/100km |
| Fuel Tank Capacity | 106 L | 60 L |
