2004 Alpina Roadster vs. 2005 Infiniti Q45
To start off, 2005 Infiniti Q45 is newer by 1 year(s). Which means there will be less support and parts availability for 2004 Alpina Roadster. In addition, the cost of maintenance, including insurance, on 2004 Alpina Roadster would be higher. At 4,490 cc (8 cylinders), 2005 Infiniti Q45 is equipped with a bigger engine. In terms of performance, 2005 Infiniti Q45 (340 HP) has 39 more horse power than 2004 Alpina Roadster. (301 HP) In normal driving conditions, 2005 Infiniti Q45 should accelerate faster than 2004 Alpina Roadster. With that said, vehicle weight also plays an important factor in acceleration. 2005 Infiniti Q45 weights approximately 217 kg more than 2004 Alpina Roadster. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Both vehicles are rear wheel drive (RWD) - it offers better handling in dry conditions; in addition, if you are looking to drift, both vehicles do the job better than front wheel drive vehicles. 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, 2005 Infiniti Q45 (453 Nm) has 91 more torque (in Nm) than 2004 Alpina Roadster. (362 Nm). This means 2005 Infiniti Q45 will have an easier job in driving up hills or pulling heavy equipment than 2004 Alpina Roadster. 2005 Infiniti Q45 has automatic transmission and 2004 Alpina Roadster has manual transmission. 2004 Alpina Roadster will offer better control over acceleration and deceleration in addition to better fuel efficiency overall. 2005 Infiniti Q45 will be easier to drive especially in heavy traffic.
Compare all specifications:
| 2004 Alpina Roadster | 2005 Infiniti Q45 | |
| Make | Alpina | Infiniti |
| Model | Roadster | Q45 |
| Year Released | 2004 | 2005 |
| Body Type | Convertible | Sedan |
| Engine Position | Front | Front |
| Engine Size | 3346 cc | 4490 cc |
| Engine Cylinders | 6 cylinders | 8 cylinders |
| Engine Type | in-line | V |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 301 HP | 340 HP |
| Torque | 362 Nm | 453 Nm |
| Engine Compression Ratio | 10.0:1 | 10.5:1 |
| Drive Type | Rear | Rear |
| Transmission Type | Manual | Automatic |
| Number of Seats | 2 seats | 5 seats |
| Number of Doors | 2 doors | 4 doors |
| Vehicle Weight | 1620 kg | 1837 kg |
| Vehicle Length | 4100 mm | 5080 mm |
| Vehicle Width | 1790 mm | 1850 mm |
| Vehicle Height | 1300 mm | 1500 mm |
| Wheelbase Size | 2500 mm | 2880 mm |
| Fuel Consumption Overall | 11.7 L/100km | 11.8 L/100km |
| Fuel Tank Capacity | 55 L | 81 L |
