1981 BMW 518 vs. 2005 Mercedes-Benz Bionic Car Concept
To start off, 2005 Mercedes-Benz Bionic Car Concept is newer by 24 year(s). Which means there will be less support and parts availability for 1981 BMW 518. In addition, the cost of maintenance, including insurance, on 1981 BMW 518 would be higher. At 1,991 cc (4 cylinders), 2005 Mercedes-Benz Bionic Car Concept is equipped with a bigger engine. In terms of performance, 2005 Mercedes-Benz Bionic Car Concept (138 HP @ 4200 RPM) has 48 more horse power than 1981 BMW 518. (90 HP @ 5500 RPM) In normal driving conditions, 2005 Mercedes-Benz Bionic Car Concept should accelerate faster than 1981 BMW 518. With that said, vehicle weight also plays an important factor in acceleration. 2005 Mercedes-Benz Bionic Car Concept weights approximately 125 kg more than 1981 BMW 518. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Let's talk about torque, 2005 Mercedes-Benz Bionic Car Concept (300 Nm @ 1600 RPM) has 160 more torque (in Nm) than 1981 BMW 518. (140 Nm @ 4000 RPM). This means 2005 Mercedes-Benz Bionic Car Concept will have an easier job in driving up hills or pulling heavy equipment than 1981 BMW 518.
Compare all specifications:
| 1981 BMW 518 | 2005 Mercedes-Benz Bionic Car Concept | |
| Make | BMW | Mercedes-Benz |
| Model | 518 | Bionic Car Concept |
| Year Released | 1981 | 2005 |
| Engine Size | 1766 cc | 1991 cc |
| Engine Cylinders | 4 cylinders | 4 cylinders |
| Engine Type | in-line | in-line |
| Horse Power | 90 HP | 138 HP |
| Engine RPM | 5500 RPM | 4200 RPM |
| Torque | 140 Nm | 300 Nm |
| Torque RPM | 4000 RPM | 1600 RPM |
| Engine Compression Ratio | 9.5:1 | 18.0:1 |
| Number of Seats | 5 seats | 4 seats |
| Number of Doors | 4 doors | 3 doors |
| Vehicle Weight | 1140 kg | 1265 kg |
| Vehicle Length | 4630 mm | 4250 mm |
| Vehicle Width | 1710 mm | 1820 mm |
| Vehicle Height | 1430 mm | 1600 mm |
| Wheelbase Size | 2630 mm | 2570 mm |
