2006 BMW Z4 vs. 2008 Mercedes-Benz R
To start off, 2008 Mercedes-Benz R is newer by 2 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 2,999 cc (6 cylinders), 2006 BMW Z4 is equipped with a bigger engine. In terms of performance, 2006 BMW Z4 (255 HP @ 6600 RPM) has 34 more horse power than 2008 Mercedes-Benz R. (221 HP @ 3800 RPM). In normal driving conditions, 2006 BMW Z4 should accelerate faster than 2008 Mercedes-Benz R. With that said, vehicle weight also plays an important factor in acceleration. 2008 Mercedes-Benz R weights approximately 460 kg more than 2006 BMW Z4.
Because 2008 Mercedes-Benz R 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, 2008 Mercedes-Benz R 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, 2008 Mercedes-Benz R (510 Nm @ 1600 RPM) has 212 more torque (in Nm) than 2006 BMW Z4. (298 Nm @ 2750 RPM). This means 2008 Mercedes-Benz R will have an easier job in driving up hills or pulling heavy equipment than 2006 BMW Z4.
Compare all specifications:
| 2006 BMW Z4 | 2008 Mercedes-Benz R | |
| Make | BMW | Mercedes-Benz |
| Model | Z4 | R |
| Year Released | 2006 | 2008 |
| Body Type | Coupe | Minivan |
| Engine Position | Front | Front |
| Engine Size | 2999 cc | 2987 cc |
| Engine Cylinders | 6 cylinders | 6 cylinders |
| Engine Type | in-line | V |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 255 HP | 221 HP |
| Engine RPM | 6600 RPM | 3800 RPM |
| Torque | 298 Nm | 510 Nm |
| Torque RPM | 2750 RPM | 1600 RPM |
| Engine Compression Ratio | 10.7:1 | 17.7:1 |
| Fuel Type | Gasoline - Premium | Diesel |
| Drive Type | Rear | 4WD |
| Number of Seats | 2 seats | 6 seats |
| Number of Doors | 2 doors | 5 doors |
| Vehicle Weight | 1835 kg | 2295 kg |
| Vehicle Length | 4100 mm | 5180 mm |
| Vehicle Width | 1790 mm | 1930 mm |
| Vehicle Height | 1270 mm | 1670 mm |
| Wheelbase Size | 2500 mm | 3220 mm |
| Fuel Consumption City | 11.8 L/100km | 11.2 L/100km |
| Fuel Consumption Overall | 9.8 L/100km | 9.3 L/100km |
| Fuel Tank Capacity | 55 L | 80 L |
