1972 AMC Ambassador vs. 2003 BMW 645
To start off, 2003 BMW 645 is newer by 31 year(s). Which means there will be less support and parts availability for 1972 AMC Ambassador. In addition, the cost of maintenance, including insurance, on 1972 AMC Ambassador would be higher. At 4,982 cc (8 cylinders), 1972 AMC Ambassador is equipped with a bigger engine. In terms of performance, 2003 BMW 645 (325 HP @ 6100 RPM) has 175 more horse power than 1972 AMC Ambassador. (150 HP @ 4200 RPM) In normal driving conditions, 2003 BMW 645 should accelerate faster than 1972 AMC Ambassador. With that said, vehicle weight also plays an important factor in acceleration. 2003 BMW 645 weights approximately 54 kg more than 1972 AMC Ambassador. 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, 2003 BMW 645 (450 Nm @ 3600 RPM) has 118 more torque (in Nm) than 1972 AMC Ambassador. (332 Nm @ 2500 RPM). This means 2003 BMW 645 will have an easier job in driving up hills or pulling heavy equipment than 1972 AMC Ambassador. 1972 AMC Ambassador has automatic transmission and 2003 BMW 645 has manual transmission. 2003 BMW 645 will offer better control over acceleration and deceleration in addition to better fuel efficiency overall. 1972 AMC Ambassador will be easier to drive especially in heavy traffic.
Compare all specifications:
| 1972 AMC Ambassador | 2003 BMW 645 | |
| Make | AMC | BMW |
| Model | Ambassador | 645 |
| Year Released | 1972 | 2003 |
| Engine Position | Front | Front |
| Engine Size | 4982 cc | 4398 cc |
| Engine Cylinders | 8 cylinders | 8 cylinders |
| Engine Type | V | V |
| Horse Power | 150 HP | 325 HP |
| Engine RPM | 4200 RPM | 6100 RPM |
| Torque | 332 Nm | 450 Nm |
| Torque RPM | 2500 RPM | 3600 RPM |
| Engine Bore Size | 95.2 mm | 92 mm |
| Engine Stroke Size | 87.3 mm | 82.7 mm |
| Engine Compression Ratio | 8.4:1 | 10.5:1 |
| Top Speed | 157 km/hour | 250 km/hour |
| Drive Type | Rear | Rear |
| Transmission Type | Automatic | Manual |
| Number of Seats | 5 seats | 4 seats |
| Number of Doors | 4 doors | 2 doors |
| Vehicle Weight | 1636 kg | 1690 kg |
| Vehicle Length | 5370 mm | 4830 mm |
| Vehicle Width | 1970 mm | 1860 mm |
| Vehicle Height | 1420 mm | 1380 mm |
| Wheelbase Size | 3110 mm | 2890 mm |
