2009 Acura RDX vs. 2005 Alpina Roadster
To start off, 2009 Acura RDX is newer by 4 year(s). Which means there will be less support and parts availability for 2005 Alpina Roadster. In addition, the cost of maintenance, including insurance, on 2005 Alpina Roadster would be higher. At 3,346 cc (6 cylinders), 2005 Alpina Roadster is equipped with a bigger engine. In terms of performance, 2005 Alpina Roadster (301 HP @ 6300 RPM) has 64 more horse power than 2009 Acura RDX. (237 HP @ 6000 RPM) In normal driving conditions, 2005 Alpina Roadster should accelerate faster than 2009 Acura RDX. With that said, vehicle weight also plays an important factor in acceleration. 2009 Acura RDX weights approximately 158 kg more than 2005 Alpina Roadster.
Because 2009 Acura RDX is four wheel drive (4WD), it will have significant more traction and grip than 2005 Alpina Roadster. In wet, icy, snow, or gravel driving conditions, 2009 Acura RDX 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, 2005 Alpina Roadster (362 Nm @ 4800 RPM) has 102 more torque (in Nm) than 2009 Acura RDX. (260 Nm @ 4500 RPM). This means 2005 Alpina Roadster will have an easier job in driving up hills or pulling heavy equipment than 2009 Acura RDX. 2009 Acura RDX has automatic transmission and 2005 Alpina Roadster has manual transmission. 2005 Alpina Roadster will offer better control over acceleration and deceleration in addition to better fuel efficiency overall. 2009 Acura RDX will be easier to drive especially in heavy traffic.
Compare all specifications:
| 2009 Acura RDX | 2005 Alpina Roadster | |
| Make | Acura | Alpina |
| Model | RDX | Roadster |
| Year Released | 2009 | 2005 |
| Body Type | SUV | Convertible |
| Engine Position | Front | Front |
| Engine Size | 2297 cc | 3346 cc |
| Engine Cylinders | 4 cylinders | 6 cylinders |
| Engine Type | in-line | in-line |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 237 HP | 301 HP |
| Engine RPM | 6000 RPM | 6300 RPM |
| Torque | 260 Nm | 362 Nm |
| Torque RPM | 4500 RPM | 4800 RPM |
| Engine Compression Ratio | 8.8:1 | 10.0:1 |
| Fuel Type | Gasoline | Gasoline |
| Drive Type | 4WD | Rear |
| Transmission Type | Automatic | Manual |
| Number of Seats | 5 seats | 2 seats |
| Number of Doors | 5 doors | 2 doors |
| Vehicle Weight | 1784 kg | 1626 kg |
| Vehicle Length | 4600 mm | 4100 mm |
| Vehicle Width | 1880 mm | 1790 mm |
| Vehicle Height | 1660 mm | 1300 mm |
| Wheelbase Size | 2660 mm | 2500 mm |
| Fuel Consumption Overall | 12.4 L/100km | 11.7 L/100km |
| Fuel Tank Capacity | 68 L | 55 L |
