2006 BMW Z4 vs. 2003 Porsche 911
To start off, 2006 BMW Z4 is newer by 3 year(s). Which means there will be less support and parts availability for 2003 Porsche 911. In addition, the cost of maintenance, including insurance, on 2003 Porsche 911 would be higher. At 3,596 cc (6 cylinders), 2003 Porsche 911 is equipped with a bigger engine. In terms of performance, 2003 Porsche 911 (340 HP @ 6800 RPM) has 112 more horse power than 2006 BMW Z4. (228 HP @ 5900 RPM) In normal driving conditions, 2003 Porsche 911 should accelerate faster than 2006 BMW Z4. With that said, vehicle weight also plays an important factor in acceleration. 2003 Porsche 911 weights approximately 15 kg more than 2006 BMW Z4. 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, 2003 Porsche 911 (370 Nm @ 4800 RPM) has 69 more torque (in Nm) than 2006 BMW Z4. (301 Nm @ 3500 RPM). This means 2003 Porsche 911 will have an easier job in driving up hills or pulling heavy equipment than 2006 BMW Z4.
Compare all specifications:
| 2006 BMW Z4 | 2003 Porsche 911 | |
| Make | BMW | Porsche |
| Model | Z4 | 911 |
| Year Released | 2006 | 2003 |
| Body Type | Convertible | Coupe |
| Engine Position | Front | Rear |
| Engine Size | 2979 cc | 3596 cc |
| Engine Cylinders | 6 cylinders | 6 cylinders |
| Engine Type | in-line | boxer |
| Horse Power | 228 HP | 340 HP |
| Engine RPM | 5900 RPM | 6800 RPM |
| Torque | 301 Nm | 370 Nm |
| Torque RPM | 3500 RPM | 4800 RPM |
| Engine Bore Size | 84 mm | 96 mm |
| Engine Stroke Size | 89.6 mm | 82.8 mm |
| Top Speed | 250 km/hour | 290 km/hour |
| Acceleration 0-100mph | 5.9 seconds | 5.2 seconds |
| Drive Type | Rear | Rear |
| Number of Seats | 2 seats | 4 seats |
| Number of Doors | 2 doors | 2 doors |
| Vehicle Weight | 1365 kg | 1380 kg |
| Vehicle Length | 4100 mm | 4440 mm |
| Vehicle Width | 1790 mm | 1780 mm |
| Vehicle Height | 1310 mm | 1300 mm |
| Wheelbase Size | 2500 mm | 2360 mm |
| Fuel Consumption | 7.8 L/100km | 8.3 L/100km |
| Fuel Consumption City | 11.8 L/100km | 16.5 L/100km |
| Fuel Consumption Overall | 9.1 L/100km | 11.3 L/100km |
| Fuel Tank Capacity | 55 L | 64 L |
