2009 BMW Z4 Roadster 2.0i vs. 2009 BMW Z4 2.5i Steptronic
To start off, both 2009 BMW Z4 Roadster 2.0i and 2009 BMW Z4 2.5i Steptronic were released in the same year (2009). Therefore the support and the availability on parts for both vehicles should be relatively similar. At 2,494 cc (6 cylinders), 2009 BMW Z4 2.5i Steptronic is equipped with a bigger engine. In terms of performance, 2009 BMW Z4 2.5i Steptronic (215 HP @ 6500 RPM) has 67 more horse power than 2009 BMW Z4 Roadster 2.0i. (148 HP @ 6200 RPM) In normal driving conditions, 2009 BMW Z4 2.5i Steptronic should accelerate faster than 2009 BMW Z4 Roadster 2.0i. With that said, vehicle weight also plays an important factor in acceleration. 2009 BMW Z4 Roadster 2.0i weights approximately 5 kg more than 2009 BMW Z4 2.5i Steptronic.
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 2.5i Steptronic (250 Nm @ 2000 RPM) has 50 more torque (in Nm) than 2009 BMW Z4 Roadster 2.0i. (200 Nm @ 3600 RPM). This means 2009 BMW Z4 2.5i Steptronic will have an easier job in driving up hills or pulling heavy equipment than 2009 BMW Z4 Roadster 2.0i. 2009 BMW Z4 2.5i Steptronic has automatic transmission and 2009 BMW Z4 Roadster 2.0i has manual transmission. 2009 BMW Z4 Roadster 2.0i will offer better control over acceleration and deceleration in addition to better fuel efficiency overall. 2009 BMW Z4 2.5i Steptronic will be easier to drive especially in heavy traffic.
Compare all specifications:
| 2009 BMW Z4 Roadster 2.0i | 2009 BMW Z4 2.5i Steptronic | |
| Make | BMW | BMW |
| Model | Z4 | Z4 |
| Year Released | 2009 | 2009 |
| Body Type | Convertible | Convertible |
| Engine Position | Front | Front |
| Engine Size | 1995 cc | 2494 cc |
| Engine Cylinders | 4 cylinders | 6 cylinders |
| Engine Type | in-line | in-line |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 148 HP | 215 HP |
| Engine RPM | 6200 RPM | 6500 RPM |
| Torque | 200 Nm | 250 Nm |
| Torque RPM | 3600 RPM | 2000 RPM |
| Engine Compression Ratio | 10.5:1 | 10.5:1 |
| Fuel Type | Gasoline - Premium | Gasoline |
| Top Speed | 215 km/hour | 227 km/hour |
| Acceleration 0-100mph | 8.2 seconds | 7.5 seconds |
| Drive Type | Rear | Rear |
| Transmission Type | Manual | Automatic |
| Number of Seats | 2 seats | 2 seats |
| Number of Doors | 2 doors | 2 doors |
| Vehicle Weight | 1295 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 | 7.5 L/100km | 9.7 L/100km |
| Fuel Tank Capacity | 55 L | 55 L |
