2003 Alpina Roadster vs. 2013 BMW 3 Series
To start off, 2013 BMW 3 Series is newer by 10 year(s). Which means there will be less support and parts availability for 2003 Alpina Roadster. In addition, the cost of maintenance, including insurance, on 2003 Alpina Roadster would be higher. At 3,346 cc (6 cylinders), 2003 Alpina Roadster is equipped with a bigger engine. In terms of performance, 2013 BMW 3 Series (316 HP @ 5900 RPM) has 15 more horse power than 2003 Alpina Roadster. (301 HP @ 6300 RPM) In normal driving conditions, 2013 BMW 3 Series should accelerate faster than 2003 Alpina Roadster. With that said, vehicle weight also plays an important factor in acceleration. 2013 BMW 3 Series weights approximately 189 kg more than 2003 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, 2013 BMW 3 Series (450 Nm @ 1500 RPM) has 88 more torque (in Nm) than 2003 Alpina Roadster. (362 Nm @ 4800 RPM). This means 2013 BMW 3 Series will have an easier job in driving up hills or pulling heavy equipment than 2003 Alpina Roadster.
Compare all specifications:
| 2003 Alpina Roadster | 2013 BMW 3 Series | |
| Make | Alpina | BMW |
| Model | Roadster | 3 Series |
| Year Released | 2003 | 2013 |
| Body Type | Convertible | Convertible |
| Engine Position | Front | Front |
| Engine Size | 3346 cc | 2979 cc |
| Engine Cylinders | 6 cylinders | 6 cylinders |
| Engine Type | in-line | in-line |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 301 HP | 316 HP |
| Engine RPM | 6300 RPM | 5900 RPM |
| Torque | 362 Nm | 450 Nm |
| Torque RPM | 4800 RPM | 1500 RPM |
| Engine Bore Size | 87 mm | 84 mm |
| Engine Stroke Size | 93.8 mm | 89 mm |
| Engine Compression Ratio | 10.0:1 | 10.2 :1 |
| Fuel Type | Gasoline - Premium | Gasoline |
| Acceleration 0-100mph | 5.4 seconds | 5.5 seconds |
| Drive Type | Rear | Rear |
| Transmission Type | Manual | 6-speed manual |
| Number of Seats | 2 seats | 5 seats |
| Number of Doors | 2 doors | 2 doors |
| Vehicle Weight | 1626 kg | 1815 kg |
| Vehicle Length | 4100 mm | 4620 mm |
| Vehicle Width | 1790 mm | 1961 mm |
| Vehicle Height | 1310 mm | 1370 mm |
| Wheelbase Size | 2500 mm | 2760 mm |
| Fuel Tank Capacity | 55 L | 61 L |
