2004 BMW Z4 vs. 2009 Aston Martin DB9
To start off, 2009 Aston Martin DB9 is newer by 5 year(s). Which means there will be less support and parts availability for 2004 BMW Z4. In addition, the cost of maintenance, including insurance, on 2004 BMW Z4 would be higher. At 5,935 cc (12 cylinders), 2009 Aston Martin DB9 is equipped with a bigger engine. In terms of performance, 2009 Aston Martin DB9 (470 HP @ 6000 RPM) has 285 more horse power than 2004 BMW Z4. (185 HP @ 6000 RPM) In normal driving conditions, 2009 Aston Martin DB9 should accelerate faster than 2004 BMW Z4. With that said, vehicle weight also plays an important factor in acceleration. 2009 Aston Martin DB9 weights approximately 539 kg more than 2004 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, 2009 Aston Martin DB9 (600 Nm @ 5000 RPM) has 355 more torque (in Nm) than 2004 BMW Z4. (245 Nm @ 3500 RPM). This means 2009 Aston Martin DB9 will have an easier job in driving up hills or pulling heavy equipment than 2004 BMW Z4. 2009 Aston Martin DB9 has automatic transmission and 2004 BMW Z4 has manual transmission. 2004 BMW Z4 will offer better control over acceleration and deceleration in addition to better fuel efficiency overall. 2009 Aston Martin DB9 will be easier to drive especially in heavy traffic.
Compare all specifications:
| 2004 BMW Z4 | 2009 Aston Martin DB9 | |
| Make | BMW | Aston Martin |
| Model | Z4 | DB9 |
| Year Released | 2004 | 2009 |
| Body Type | Convertible | Coupe |
| Engine Position | Front | Front |
| Engine Size | 2494 cc | 5935 cc |
| Engine Cylinders | 6 cylinders | 12 cylinders |
| Engine Type | in-line | V |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 185 HP | 470 HP |
| Engine RPM | 6000 RPM | 6000 RPM |
| Torque | 245 Nm | 600 Nm |
| Torque RPM | 3500 RPM | 5000 RPM |
| Engine Bore Size | 84 mm | 89 mm |
| Engine Stroke Size | 75 mm | 79.5 mm |
| Engine Compression Ratio | 11.0:1 | 10.9:1 |
| Fuel Type | Gasoline - Premium | Gasoline - Premium |
| Top Speed | 235 km/hour | 306 km/hour |
| Drive Type | Rear | Rear |
| Transmission Type | Manual | Automatic |
| Number of Seats | 2 seats | 4 seats |
| Number of Doors | 2 doors | 2 doors |
| Vehicle Weight | 1296 kg | 1835 kg |
| Vehicle Length | 4100 mm | 4720 mm |
| Vehicle Width | 1790 mm | 1880 mm |
| Vehicle Height | 1300 mm | 1280 mm |
| Wheelbase Size | 2500 mm | 2750 mm |
| Fuel Consumption | 8.4 L/100km | 12.4 L/100km |
| Fuel Consumption City | 11.8 L/100km | 19.6 L/100km |
| Fuel Consumption Overall | 10.2 L/100km | 16.4 L/100km |
| Fuel Tank Capacity | 55 L | 78 L |
