2006 BMW Z4 vs. 2011 BMW X6
To start off, 2011 BMW X6 is newer by 5 year(s). Which means there will be less support and parts availability for 2006 BMW Z4. In addition, the cost of maintenance, including insurance, on 2006 BMW Z4 would be higher. At 4,400 cc (8 cylinders), 2011 BMW X6 is equipped with a bigger engine. In terms of performance, 2011 BMW X6 (400 HP @ 5500 RPM) has 211 more horse power than 2006 BMW Z4. (189 HP @ 6000 RPM) In normal driving conditions, 2011 BMW X6 should accelerate faster than 2006 BMW Z4. With that said, vehicle weight also plays an important factor in acceleration. 2011 BMW X6 weights approximately 1035 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 2011 BMW X6 is all wheel drive (AWD), it will have significant more traction and grip than 2006 BMW Z4. In wet, icy, snow, or gravel driving conditions, 2011 BMW X6 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, 2011 BMW X6 (609 Nm @ 1750 RPM) has 364 more torque (in Nm) than 2006 BMW Z4. (245 Nm @ 3500 RPM). This means 2011 BMW X6 will have an easier job in driving up hills or pulling heavy equipment than 2006 BMW Z4. 2011 BMW X6 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. 2011 BMW X6 will be easier to drive especially in heavy traffic.
Compare all specifications:
| 2006 BMW Z4 | 2011 BMW X6 | |
| Make | BMW | BMW |
| Model | Z4 | X6 |
| Year Released | 2006 | 2011 |
| Body Type | Convertible | SUV |
| Engine Position | Front | Front |
| Engine Size | 2494 cc | 4400 cc |
| Engine Cylinders | 6 cylinders | 8 cylinders |
| Engine Type | in-line | V |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 189 HP | 400 HP |
| Engine RPM | 6000 RPM | 5500 RPM |
| Torque | 245 Nm | 609 Nm |
| Torque RPM | 3500 RPM | 1750 RPM |
| Fuel Type | Gasoline | Gasoline |
| Drive Type | Rear | AWD |
| Transmission Type | Manual | Automatic |
| Number of Seats | 2 seats | 4 seats |
| Number of Doors | 2 doors | 5 doors |
| Vehicle Weight | 1335 kg | 2370 kg |
| Vehicle Length | 4100 mm | 4879 mm |
| Vehicle Width | 1790 mm | 1984 mm |
| Vehicle Height | 1310 mm | 1689 mm |
| Wheelbase Size | 2500 mm | 2934 mm |
| Fuel Tank Capacity | 55 L | 85 L |
