2009 Saturn Sky vs. 2011 BMW Z4
To start off, 2011 BMW Z4 is newer by 2 year(s). Which means there will be less support and parts availability for 2009 Saturn Sky. In addition, the cost of maintenance, including insurance, on 2009 Saturn Sky would be higher. At 2,400 cc (4 cylinders), 2009 Saturn Sky is equipped with a bigger engine. In terms of performance, 2011 BMW Z4 (244 HP @ 5000 RPM) has 71 more horse power than 2009 Saturn Sky. (173 HP @ 5800 RPM) In normal driving conditions, 2011 BMW Z4 should accelerate faster than 2009 Saturn Sky. With that said, vehicle weight also plays an important factor in acceleration. 2009 Saturn Sky weights approximately 245 kg more than 2011 BMW Z4.
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, 2011 BMW Z4 (350 Nm @ 1500 RPM) has 124 more torque (in Nm) than 2009 Saturn Sky. (226 Nm @ 4500 RPM). This means 2011 BMW Z4 will have an easier job in driving up hills or pulling heavy equipment than 2009 Saturn Sky.
Compare all specifications:
| 2009 Saturn Sky | 2011 BMW Z4 | |
| Make | Saturn | BMW |
| Model | Sky | Z4 |
| Year Released | 2009 | 2011 |
| Body Type | Convertible | Convertible |
| Engine Position | Front | Front |
| Engine Size | 2400 cc | 1997 cc |
| Engine Cylinders | 4 cylinders | 4 cylinders |
| Engine Type | in-line | in-line |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 173 HP | 244 HP |
| Engine RPM | 5800 RPM | 5000 RPM |
| Torque | 226 Nm | 350 Nm |
| Torque RPM | 4500 RPM | 1500 RPM |
| Engine Bore Size | 99.1 mm | 90.1 mm |
| Engine Stroke Size | 75.9 mm | 84 mm |
| Fuel Type | Gasoline | Gasoline |
| Drive Type | Rear | Rear |
| Transmission Type | Manual | Manual |
| Number of Seats | 2 seats | 2 seats |
| Number of Doors | 2 doors | 2 doors |
| Vehicle Weight | 1735 kg | 1490 kg |
| Vehicle Length | 4100 mm | 4239 mm |
| Vehicle Width | 1820 mm | 1791 mm |
| Vehicle Height | 1280 mm | 1290 mm |
| Wheelbase Size | 2420 mm | 2497 mm |
| Fuel Consumption Highway | 9.4 L/100km | 5.5 L/100km |
| Fuel Consumption City | 12.4 L/100km | 9.1 L/100km |
| Fuel Consumption Overall | 11.2 L/100km | 6.8 L/100km |
| Fuel Tank Capacity | 49 L | 55 L |
