2006 BMW 645 vs. 1975 Mazda 929
To start off, 2006 BMW 645 is newer by 31 year(s). Which means there will be less support and parts availability for 1975 Mazda 929. In addition, the cost of maintenance, including insurance, on 1975 Mazda 929 would be higher. At 4,398 cc (8 cylinders), 2006 BMW 645 is equipped with a bigger engine. In terms of performance, 2006 BMW 645 (328 HP @ 6100 RPM) has 245 more horse power than 1975 Mazda 929. (83 HP @ 5000 RPM). In normal driving conditions, 2006 BMW 645 should accelerate faster than 1975 Mazda 929. With that said, vehicle weight also plays an important factor in acceleration. 2006 BMW 645 weights approximately 740 kg more than 1975 Mazda 929. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Let's talk about torque, 2006 BMW 645 (450 Nm @ 3600 RPM) has 316 more torque (in Nm) than 1975 Mazda 929. (134 Nm @ 3000 RPM). This means 2006 BMW 645 will have an easier job in driving up hills or pulling heavy equipment than 1975 Mazda 929.
Compare all specifications:
| 2006 BMW 645 | 1975 Mazda 929 | |
| Make | BMW | Mazda |
| Model | 645 | 929 |
| Year Released | 2006 | 1975 |
| Engine Position | Front | Front |
| Engine Size | 4398 cc | 1769 cc |
| Engine Cylinders | 8 cylinders | 4 cylinders |
| Engine Type | V | in-line |
| Horse Power | 328 HP | 83 HP |
| Engine RPM | 6100 RPM | 5000 RPM |
| Torque | 450 Nm | 134 Nm |
| Torque RPM | 3600 RPM | 3000 RPM |
| Engine Compression Ratio | 10.0:1 | 8.6:1 |
| Fuel Type | Gasoline | Gasoline |
| Number of Seats | 4 seats | 5 seats |
| Number of Doors | 2 doors | 4 doors |
| Vehicle Weight | 1810 kg | 1070 kg |
| Vehicle Length | 4830 mm | 4410 mm |
| Vehicle Width | 1860 mm | 1670 mm |
| Vehicle Height | 1380 mm | 1420 mm |
| Wheelbase Size | 2790 mm | 2520 mm |
| Fuel Tank Capacity | 70 L | 55 L |
