2006 BMW Z4 vs. 2005 Porsche 911
To start off, 2006 BMW Z4 is newer by 1 year(s). Which means there will be less support and parts availability for 2005 Porsche 911. In addition, the cost of maintenance, including insurance, on 2005 Porsche 911 would be higher. At 3,596 cc (6 cylinders), 2005 Porsche 911 is equipped with a bigger engine. In terms of performance, 2005 Porsche 911 (321 HP @ 4250 RPM) has 132 more horse power than 2006 BMW Z4. (189 HP @ 6000 RPM) In normal driving conditions, 2005 Porsche 911 should accelerate faster than 2006 BMW Z4. With that said, vehicle weight also plays an important factor in acceleration. 2005 Porsche 911 weights approximately 70 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.
Because 2005 Porsche 911 is four wheel drive (4WD), it will have significant more traction and grip than 2006 BMW Z4. In wet, icy, snow, or gravel driving conditions, 2005 Porsche 911 will offer significantly more control. 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, 2005 Porsche 911 (370 Nm @ 4250 RPM) has 125 more torque (in Nm) than 2006 BMW Z4. (245 Nm @ 3500 RPM). This means 2005 Porsche 911 will have an easier job in driving up hills or pulling heavy equipment than 2006 BMW Z4. 2005 Porsche 911 has automatic transmission and 2006 BMW Z4 has manual transmission. 2006 BMW Z4 will offer better control over acceleration and deceleration in addition to better fuel efficiency overall. 2005 Porsche 911 will be easier to drive especially in heavy traffic.
Compare all specifications:
| 2006 BMW Z4 | 2005 Porsche 911 | |
| Make | BMW | Porsche |
| Model | Z4 | 911 |
| Year Released | 2006 | 2005 |
| Body Type | Convertible | Coupe |
| Engine Position | Front | Rear |
| Engine Size | 2492 cc | 3596 cc |
| Engine Cylinders | 6 cylinders | 6 cylinders |
| Engine Type | in-line | boxer |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 189 HP | 321 HP |
| Engine RPM | 6000 RPM | 4250 RPM |
| Torque | 245 Nm | 370 Nm |
| Torque RPM | 3500 RPM | 4250 RPM |
| Engine Bore Size | 84 mm | 96 mm |
| Engine Stroke Size | 75 mm | 82.8 mm |
| Engine Compression Ratio | 11.0:1 | 11.3:1 |
| Top Speed | 235 km/hour | 285 km/hour |
| Acceleration 0-100mph | 7 seconds | 5.3 seconds |
| Drive Type | Rear | 4WD |
| Transmission Type | Manual | Automatic |
| Number of Doors | 2 doors | 2 doors |
| Vehicle Weight | 1335 kg | 1405 kg |
| Vehicle Length | 4100 mm | 4440 mm |
| Vehicle Width | 1790 mm | 1780 mm |
| Vehicle Height | 1310 mm | 1310 mm |
| Wheelbase Size | 2500 mm | 2360 mm |
| Fuel Consumption Overall | 9 L/100km | 11.2 L/100km |
| Fuel Tank Capacity | 55 L | 64 L |
