1984 Ford Sierra vs. 2008 BMW 645
To start off, 2008 BMW 645 is newer by 24 year(s). Which means there will be less support and parts availability for 1984 Ford Sierra. In addition, the cost of maintenance, including insurance, on 1984 Ford Sierra would be higher. At 4,398 cc (8 cylinders), 2008 BMW 645 is equipped with a bigger engine. In terms of performance, 2008 BMW 645 (328 HP @ 6100 RPM) has 168 more horse power than 1984 Ford Sierra. (160 HP @ 5700 RPM) In normal driving conditions, 2008 BMW 645 should accelerate faster than 1984 Ford Sierra. With that said, vehicle weight also plays an important factor in acceleration. 2008 BMW 645 weights approximately 510 kg more than 1984 Ford Sierra. 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, 2008 BMW 645 (450 Nm @ 3600 RPM) has 234 more torque (in Nm) than 1984 Ford Sierra. (216 Nm @ 4300 RPM). This means 2008 BMW 645 will have an easier job in driving up hills or pulling heavy equipment than 1984 Ford Sierra. 2008 BMW 645 has automatic transmission and 1984 Ford Sierra has manual transmission. 1984 Ford Sierra will offer better control over acceleration and deceleration in addition to better fuel efficiency overall. 2008 BMW 645 will be easier to drive especially in heavy traffic.
Compare all specifications:
| 1984 Ford Sierra | 2008 BMW 645 | |
| Make | Ford | BMW |
| Model | Sierra | 645 |
| Year Released | 1984 | 2008 |
| Engine Position | Front | Front |
| Engine Size | 2792 cc | 4398 cc |
| Engine Cylinders | 6 cylinders | 8 cylinders |
| Engine Type | V | V |
| Horse Power | 160 HP | 328 HP |
| Engine RPM | 5700 RPM | 6100 RPM |
| Torque | 216 Nm | 450 Nm |
| Torque RPM | 4300 RPM | 3600 RPM |
| Engine Bore Size | 93.1 mm | 92.1 mm |
| Engine Stroke Size | 68.5 mm | 82.7 mm |
| Engine Compression Ratio | 9.2:1 | 10.0:1 |
| Drive Type | Rear | Rear |
| Transmission Type | Manual | Automatic |
| Number of Seats | 5 seats | 4 seats |
| Vehicle Weight | 1180 kg | 1690 kg |
| Vehicle Length | 4430 mm | 4830 mm |
| Vehicle Width | 1730 mm | 1860 mm |
| Vehicle Height | 1370 mm | 1380 mm |
| Wheelbase Size | 2610 mm | 2790 mm |
