2009 BMW Z4 vs. 2005 Opel Speedster
To start off, 2009 BMW Z4 is newer by 4 year(s). Which means there will be less support and parts availability for 2005 Opel Speedster. In addition, the cost of maintenance, including insurance, on 2005 Opel Speedster would be higher. At 2,996 cc (6 cylinders), 2009 BMW Z4 is equipped with a bigger engine. In terms of performance, 2009 BMW Z4 (261 HP @ 6600 RPM) has 64 more horse power than 2005 Opel Speedster. (197 HP @ 5500 RPM). In normal driving conditions, 2009 BMW Z4 should accelerate faster than 2005 Opel Speedster. With that said, vehicle weight also plays an important factor in acceleration. 2009 BMW Z4 weights approximately 390 kg more than 2005 Opel Speedster. 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, 2009 BMW Z4 (315 Nm @ 2750 RPM) has 64 more torque (in Nm) than 2005 Opel Speedster. (251 Nm @ 1950 RPM). This means 2009 BMW Z4 will have an easier job in driving up hills or pulling heavy equipment than 2005 Opel Speedster.
Compare all specifications:
| 2009 BMW Z4 | 2005 Opel Speedster | |
| Make | BMW | Opel |
| Model | Z4 | Speedster |
| Year Released | 2009 | 2005 |
| Body Type | Coupe | Convertible |
| Engine Position | Front | Middle |
| Engine Size | 2996 cc | 1998 cc |
| Engine Cylinders | 6 cylinders | 4 cylinders |
| Engine Type | in-line | in-line |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 261 HP | 197 HP |
| Engine RPM | 6600 RPM | 5500 RPM |
| Torque | 315 Nm | 251 Nm |
| Torque RPM | 2750 RPM | 1950 RPM |
| Engine Bore Size | 85.1 mm | 86 mm |
| Engine Stroke Size | 88 mm | 86 mm |
| Fuel Type | Gasoline - Premium | Gasoline - Premium |
| Acceleration 0-100mph | 5.7 seconds | 4.9 seconds |
| Drive Type | Rear | Rear |
| Transmission Type | Manual | Manual |
| Number of Seats | 2 seats | 2 seats |
| Number of Doors | 2 doors | 2 doors |
| Vehicle Weight | 1395 kg | 1005 kg |
| Vehicle Length | 4100 mm | 3790 mm |
| Vehicle Width | 1790 mm | 1710 mm |
| Vehicle Height | 1270 mm | 1120 mm |
| Wheelbase Size | 2500 mm | 2340 mm |
| Fuel Consumption Overall | 8.9 L/100km | 8.5 L/100km |
| Fuel Tank Capacity | 55 L | 36 L |
