1984 Ford Sierra vs. 2005 BMW X5
To start off, 2005 BMW X5 is newer by 21 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 2,926 cc (6 cylinders), 2005 BMW X5 is equipped with a bigger engine. In terms of performance, 2005 BMW X5 (215 HP @ 4000 RPM) has 55 more horse power than 1984 Ford Sierra. (160 HP @ 5700 RPM) In normal driving conditions, 2005 BMW X5 should accelerate faster than 1984 Ford Sierra. With that said, vehicle weight also plays an important factor in acceleration. 2005 BMW X5 weights approximately 990 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.
Because 2005 BMW X5 is four wheel drive (4WD), it will have significant more traction and grip than 1984 Ford Sierra. In wet, icy, snow, or gravel driving conditions, 2005 BMW X5 will offer significantly more control. 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, 2005 BMW X5 (520 Nm @ 2000 RPM) has 304 more torque (in Nm) than 1984 Ford Sierra. (216 Nm @ 4300 RPM). This means 2005 BMW X5 will have an easier job in driving up hills or pulling heavy equipment than 1984 Ford Sierra. 2005 BMW X5 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. 2005 BMW X5 will be easier to drive especially in heavy traffic.
Compare all specifications:
| 1984 Ford Sierra | 2005 BMW X5 | |
| Make | Ford | BMW |
| Model | Sierra | X5 |
| Year Released | 1984 | 2005 |
| Engine Position | Front | Front |
| Engine Size | 2792 cc | 2926 cc |
| Engine Cylinders | 6 cylinders | 6 cylinders |
| Engine Type | V | in-line |
| Horse Power | 160 HP | 215 HP |
| Engine RPM | 5700 RPM | 4000 RPM |
| Torque | 216 Nm | 520 Nm |
| Torque RPM | 4300 RPM | 2000 RPM |
| Engine Bore Size | 93.1 mm | 84 mm |
| Engine Stroke Size | 68.5 mm | 90 mm |
| Engine Compression Ratio | 9.2:1 | 18.0:1 |
| Drive Type | Rear | 4WD |
| Transmission Type | Manual | Automatic |
| Number of Seats | 5 seats | 5 seats |
| Vehicle Weight | 1180 kg | 2170 kg |
| Vehicle Length | 4430 mm | 4670 mm |
| Vehicle Width | 1730 mm | 1880 mm |
| Vehicle Height | 1370 mm | 1720 mm |
| Wheelbase Size | 2610 mm | 2830 mm |
