1981 BMW 628 vs. 2007 BMW X3
To start off, 2007 BMW X3 is newer by 26 year(s). Which means there will be less support and parts availability for 1981 BMW 628. In addition, the cost of maintenance, including insurance, on 1981 BMW 628 would be higher. At 2,979 cc (6 cylinders), 2007 BMW X3 is equipped with a bigger engine. In terms of performance, 2007 BMW X3 (260 HP @ 6600 RPM) has 79 more horse power than 1981 BMW 628. (181 HP @ 6000 RPM) In normal driving conditions, 2007 BMW X3 should accelerate faster than 1981 BMW 628.
Because 2007 BMW X3 is four wheel drive (4WD), it will have significant more traction and grip than 1981 BMW 628. In wet, icy, snow, or gravel driving conditions, 2007 BMW X3 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, 2007 BMW X3 (305 Nm @ 2750 RPM) has 65 more torque (in Nm) than 1981 BMW 628. (240 Nm @ 4000 RPM). This means 2007 BMW X3 will have an easier job in driving up hills or pulling heavy equipment than 1981 BMW 628. 2007 BMW X3 has automatic transmission and 1981 BMW 628 has manual transmission. 1981 BMW 628 will offer better control over acceleration and deceleration in addition to better fuel efficiency overall. 2007 BMW X3 will be easier to drive especially in heavy traffic.
Compare all specifications:
| 1981 BMW 628 | 2007 BMW X3 | |
| Make | BMW | BMW |
| Model | 628 | X3 |
| Year Released | 1981 | 2007 |
| Body Type | Coupe | SUV |
| Engine Position | Front | Front |
| Engine Size | 2788 cc | 2979 cc |
| Engine Cylinders | 6 cylinders | 6 cylinders |
| Engine Type | in-line | in-line |
| Valves per Cylinder | 2 valves | 4 valves |
| Horse Power | 181 HP | 260 HP |
| Engine RPM | 6000 RPM | 6600 RPM |
| Torque | 240 Nm | 305 Nm |
| Torque RPM | 4000 RPM | 2750 RPM |
| Engine Bore Size | 86 mm | 85.1 mm |
| Engine Stroke Size | 80 mm | 87.9 mm |
| Engine Compression Ratio | 9.3:1 | 10.7:1 |
| Fuel Type | Gasoline | Gasoline |
| Drive Type | Rear | 4WD |
| Transmission Type | Manual | Automatic |
| Number of Doors | 2 doors | 5 doors |
