2007 BMW 645 vs. 2009 Mazda MX-5 Miata
To start off, 2009 Mazda MX-5 Miata is newer by 2 year(s). Which means there will be less support and parts availability for 2007 BMW 645. In addition, the cost of maintenance, including insurance, on 2007 BMW 645 would be higher. At 4,398 cc (8 cylinders), 2007 BMW 645 is equipped with a bigger engine. In terms of performance, 2007 BMW 645 (328 HP @ 6100 RPM) has 161 more horse power than 2009 Mazda MX-5 Miata. (167 HP @ 7000 RPM). In normal driving conditions, 2007 BMW 645 should accelerate faster than 2009 Mazda MX-5 Miata. With that said, vehicle weight also plays an important factor in acceleration. 2007 BMW 645 weights approximately 635 kg more than 2009 Mazda MX-5 Miata. 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, 2007 BMW 645 (450 Nm @ 3600 RPM) has 260 more torque (in Nm) than 2009 Mazda MX-5 Miata. (190 Nm @ 5000 RPM). This means 2007 BMW 645 will have an easier job in driving up hills or pulling heavy equipment than 2009 Mazda MX-5 Miata.
Compare all specifications:
| 2007 BMW 645 | 2009 Mazda MX-5 Miata | |
| Make | BMW | Mazda |
| Model | 645 | MX-5 Miata |
| Year Released | 2007 | 2009 |
| Body Type | Convertible | Convertible |
| Engine Position | Front | Front |
| Engine Size | 4398 cc | 1997 cc |
| Engine Cylinders | 8 cylinders | 4 cylinders |
| Engine Type | V | in-line |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 328 HP | 167 HP |
| Engine RPM | 6100 RPM | 7000 RPM |
| Torque | 450 Nm | 190 Nm |
| Torque RPM | 3600 RPM | 5000 RPM |
| Engine Bore Size | 92 mm | 87.5 mm |
| Engine Stroke Size | 82.7 mm | 83.1 mm |
| Engine Compression Ratio | 10.0:1 | 10.0:1 |
| Fuel Type | Gasoline - Premium | Gasoline |
| Drive Type | Rear | Rear |
| Transmission Type | Manual | Manual |
| Number of Seats | 4 seats | 2 seats |
| Number of Doors | 2 doors | 2 doors |
| Vehicle Weight | 1815 kg | 1180 kg |
| Vehicle Length | 4830 mm | 4000 mm |
| Vehicle Width | 1860 mm | 1730 mm |
| Vehicle Height | 1380 mm | 1250 mm |
| Wheelbase Size | 2790 mm | 2340 mm |
| Fuel Consumption Overall | 13 L/100km | 8.7 L/100km |
| Fuel Tank Capacity | 70 L | 48 L |
