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, 2003 Alpina Roadster (301 HP @ 6300 RPM) has 63 more horse power than 2013 BMW 3 Series. (238 HP @ 5800 RPM). In normal driving conditions, 2003 Alpina Roadster should accelerate faster than 2013 BMW 3 Series. With that said, vehicle weight also plays an important factor in acceleration. 2013 BMW 3 Series weights approximately 57 kg more than 2003 Alpina Roadster.
Because 2013 BMW 3 Series is all wheel drive (AWD), it will have significant more traction and grip than 2003 Alpina Roadster. In wet, icy, snow, or gravel driving conditions, 2013 BMW 3 Series 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, 2013 BMW 3 Series (407 Nm @ 5000 RPM) has 45 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. 2013 BMW 3 Series has automatic transmission and 2003 Alpina Roadster has manual transmission. 2003 Alpina Roadster will offer better control over acceleration and deceleration in addition to better fuel efficiency overall. 2013 BMW 3 Series will be easier to drive especially in heavy traffic.
Compare all specifications:
| 2003 Alpina Roadster | 2013 BMW 3 Series | |
| Make | Alpina | BMW |
| Model | Roadster | 3 Series |
| Year Released | 2003 | 2013 |
| Body Type | Convertible | Sedan |
| 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 | 238 HP |
| Engine RPM | 6300 RPM | 5800 RPM |
| Torque | 362 Nm | 407 Nm |
| Torque RPM | 4800 RPM | 5000 RPM |
| Engine Bore Size | 87 mm | 84 mm |
| Engine Stroke Size | 93.8 mm | 89 mm |
| Engine Compression Ratio | 10.0:1 | 10.2 |
| Fuel Type | Gasoline - Premium | Gasoline |
| Drive Type | Rear | AWD |
| Transmission Type | Manual | 8-speed automatic |
| Number of Seats | 2 seats | 5 seats |
| Number of Doors | 2 doors | 4 doors |
| Vehicle Weight | 1626 kg | 1683 kg |
| Vehicle Length | 4100 mm | 4636 mm |
| Vehicle Width | 1790 mm | 2031 mm |
| Vehicle Height | 1310 mm | 1434 mm |
| Wheelbase Size | 2500 mm | 2810 mm |
| Fuel Tank Capacity | 55 L | 60 L |
