2009 BMW Z4 vs. 2003 Porsche Boxster
To start off, 2009 BMW Z4 is newer by 6 year(s). Which means there will be less support and parts availability for 2003 Porsche Boxster. In addition, the cost of maintenance, including insurance, on 2003 Porsche Boxster would be higher. At 3,246 cc (6 cylinders), 2009 BMW Z4 is equipped with a bigger engine. In terms of performance, 2009 BMW Z4 (338 HP @ 7900 RPM) has 76 more horse power than 2003 Porsche Boxster. (262 HP @ 6200 RPM). In normal driving conditions, 2009 BMW Z4 should accelerate faster than 2003 Porsche Boxster. With that said, vehicle weight also plays an important factor in acceleration. 2009 BMW Z4 weights approximately 105 kg more than 2003 Porsche Boxster. 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 (365 Nm @ 4900 RPM) has 55 more torque (in Nm) than 2003 Porsche Boxster. (310 Nm @ 4600 RPM). This means 2009 BMW Z4 will have an easier job in driving up hills or pulling heavy equipment than 2003 Porsche Boxster.
Compare all specifications:
| 2009 BMW Z4 | 2003 Porsche Boxster | |
| Make | BMW | Porsche |
| Model | Z4 | Boxster |
| Year Released | 2009 | 2003 |
| Body Type | Convertible | Convertible |
| Engine Position | Front | Middle |
| Engine Size | 3246 cc | 3179 cc |
| Engine Cylinders | 6 cylinders | 6 cylinders |
| Engine Type | in-line | boxer |
| Horse Power | 338 HP | 262 HP |
| Engine RPM | 7900 RPM | 6200 RPM |
| Torque | 365 Nm | 310 Nm |
| Torque RPM | 4900 RPM | 4600 RPM |
| Engine Compression Ratio | 11.5:1 | 11.0:1 |
| Top Speed | 250 km/hour | 266 km/hour |
| Acceleration 0-100mph | 5 seconds | 5.7 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 | 1380 kg |
| Vehicle Length | 4120 mm | 4330 mm |
| Vehicle Width | 1310 mm | 1790 mm |
| Vehicle Height | 1790 mm | 1290 mm |
| Wheelbase Size | 2500 mm | 2420 mm |
| Fuel Consumption Overall | 12.3 L/100km | 10.5 L/100km |
| Fuel Tank Capacity | 70 L | 64 L |
