1981 BMW 628 vs. 2008 Daihatsu Sirion
To start off, 2008 Daihatsu Sirion is newer by 27 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 2,788 cc (6 cylinders), 1981 BMW 628 is equipped with a bigger engine. In terms of performance, 1981 BMW 628 (181 HP @ 6000 RPM) has 91 more horse power than 2008 Daihatsu Sirion. (90 HP @ 6000 RPM). In normal driving conditions, 1981 BMW 628 should accelerate faster than 2008 Daihatsu Sirion. With that said, vehicle weight also plays an important factor in acceleration. 1981 BMW 628 weights approximately 490 kg more than 2008 Daihatsu Sirion. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Because 2008 Daihatsu Sirion 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, 2008 Daihatsu Sirion 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, 1981 BMW 628 (240 Nm @ 4000 RPM) has 120 more torque (in Nm) than 2008 Daihatsu Sirion. (120 Nm @ 4400 RPM). This means 1981 BMW 628 will have an easier job in driving up hills or pulling heavy equipment than 2008 Daihatsu Sirion.
Compare all specifications:
| 1981 BMW 628 | 2008 Daihatsu Sirion | |
| Make | BMW | Daihatsu |
| Model | 628 | Sirion |
| Year Released | 1981 | 2008 |
| Body Type | Coupe | Hatchback |
| Engine Position | Front | Front |
| Engine Size | 2788 cc | 1298 cc |
| Engine Cylinders | 6 cylinders | 4 cylinders |
| Engine Type | in-line | in-line |
| Valves per Cylinder | 2 valves | 4 valves |
| Horse Power | 181 HP | 90 HP |
| Engine RPM | 6000 RPM | 6000 RPM |
| Torque | 240 Nm | 120 Nm |
| Torque RPM | 4000 RPM | 4400 RPM |
| Engine Bore Size | 86 mm | 72 mm |
| Engine Stroke Size | 80 mm | 79.7 mm |
| Engine Compression Ratio | 9.3:1 | 10.0:1 |
| Fuel Type | Gasoline | Gasoline - Premium |
| Drive Type | Rear | 4WD |
| Number of Seats | 4 seats | 5 seats |
| Number of Doors | 2 doors | 5 doors |
| Vehicle Weight | 1470 kg | 980 kg |
| Vehicle Length | 4760 mm | 3610 mm |
| Vehicle Width | 1730 mm | 1670 mm |
| Vehicle Height | 1370 mm | 1560 mm |
| Wheelbase Size | 2640 mm | 2440 mm |
| Fuel Tank Capacity | 70 L | 38 L |
