2007 BMW Z4 2.5Si Roadster E85 vs. 2007 BMW Z4 3.0i
To start off, both 2007 BMW Z4 2.5Si Roadster E85 and 2007 BMW Z4 3.0i were released in the same year (2007). Therefore the support and the availability on parts for both vehicles should be relatively similar. At 2,979 cc (6 cylinders), 2007 BMW Z4 3.0i is equipped with a bigger engine. In terms of performance, 2007 BMW Z4 3.0i (335 HP @ 7900 RPM) has 120 more horse power than 2007 BMW Z4 2.5Si Roadster E85. (215 HP @ 6500 RPM) In normal driving conditions, 2007 BMW Z4 3.0i should accelerate faster than 2007 BMW Z4 2.5Si Roadster E85. With that said, vehicle weight also plays an important factor in acceleration. 2007 BMW Z4 2.5Si Roadster E85 weights approximately 72 kg more than 2007 BMW Z4 3.0i.
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 3.0i (315 Nm @ 2750 RPM) has 65 more torque (in Nm) than 2007 BMW Z4 2.5Si Roadster E85. (250 Nm @ 2750 RPM). This means 2007 BMW Z4 3.0i will have an easier job in driving up hills or pulling heavy equipment than 2007 BMW Z4 2.5Si Roadster E85.
Compare all specifications:
| 2007 BMW Z4 2.5Si Roadster E85 | 2007 BMW Z4 3.0i | |
| Make | BMW | BMW |
| Model | Z4 | Z4 |
| Year Released | 2007 | 2007 |
| Body Type | Convertible | Convertible |
| Engine Position | Front | Front |
| Engine Size | 2497 cc | 2979 cc |
| Engine Cylinders | 6 cylinders | 6 cylinders |
| Engine Type | in-line | in-line |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 215 HP | 335 HP |
| Engine RPM | 6500 RPM | 7900 RPM |
| Torque | 250 Nm | 315 Nm |
| Torque RPM | 2750 RPM | 2750 RPM |
| Engine Bore Size | 82 mm | 87 mm |
| Engine Stroke Size | 78.8 mm | 91 mm |
| Fuel Type | Gasoline | Gasoline |
| Top Speed | 240 km/hour | 250 km/hour |
| Acceleration 0-100mph | 6.5 seconds | 5.9 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 | 1362 kg | 1290 kg |
| Vehicle Length | 4100 mm | 4100 mm |
| Vehicle Width | 1310 mm | 1790 mm |
| Vehicle Height | 1790 mm | 1310 mm |
| Wheelbase Size | 2500 mm | 2500 mm |
| Fuel Consumption Overall | 8.4 L/100km | 9.1 L/100km |
| Fuel Tank Capacity | 55 L | 55 L |
