2007 BMW Z4 vs. 2007 Opel Speedster
To start off, both 2007 BMW Z4 and 2007 Opel Speedster were released in the same year (2007). Therefore the support and the availability on parts for both vehicles should be relatively similar. At 3,246 cc (6 cylinders), 2007 BMW Z4 is equipped with a bigger engine. In terms of performance, 2007 BMW Z4 (338 HP @ 7900 RPM) has 141 more horse power than 2007 Opel Speedster. (197 HP @ 5500 RPM). In normal driving conditions, 2007 BMW Z4 should accelerate faster than 2007 Opel Speedster. With that said, vehicle weight also plays an important factor in acceleration. 2007 BMW Z4 weights approximately 480 kg more than 2007 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, 2007 BMW Z4 (365 Nm @ 4900 RPM) has 115 more torque (in Nm) than 2007 Opel Speedster. (250 Nm @ 1950 RPM). This means 2007 BMW Z4 will have an easier job in driving up hills or pulling heavy equipment than 2007 Opel Speedster.
Compare all specifications:
| 2007 BMW Z4 | 2007 Opel Speedster | |
| Make | BMW | Opel |
| Model | Z4 | Speedster |
| Year Released | 2007 | 2007 |
| Body Type | Convertible | Convertible |
| Engine Position | Front | Middle |
| Engine Size | 3246 cc | 1998 cc |
| Engine Cylinders | 6 cylinders | 4 cylinders |
| Engine Type | in-line | in-line |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 338 HP | 197 HP |
| Engine RPM | 7900 RPM | 5500 RPM |
| Torque | 365 Nm | 250 Nm |
| Torque RPM | 4900 RPM | 1950 RPM |
| Engine Bore Size | 87 mm | 86 mm |
| Engine Stroke Size | 91 mm | 86 mm |
| Engine Compression Ratio | 11.5:1 | 8.8:1 |
| Fuel Type | Gasoline - Premium | Gasoline - Premium |
| Top Speed | 250 km/hour | 243 km/hour |
| Acceleration 0-100mph | 5 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 | 1485 kg | 1005 kg |
| Vehicle Length | 4120 mm | 3790 mm |
| Vehicle Width | 1790 mm | 1710 mm |
| Vehicle Height | 1310 mm | 1120 mm |
| Wheelbase Size | 2500 mm | 2340 mm |
| Fuel Consumption Overall | 12.1 L/100km | 8.7 L/100km |
| Fuel Tank Capacity | 55 L | 36 L |
