1977 Mazda 121 vs. 2013 BMW 5 Series
To start off, 2013 BMW 5 Series is newer by 36 year(s). Which means there will be less support and parts availability for 1977 Mazda 121. In addition, the cost of maintenance, including insurance, on 1977 Mazda 121 would be higher. At 4,395 cc (8 cylinders), 2013 BMW 5 Series is equipped with a bigger engine. In terms of performance, 2013 BMW 5 Series (439 HP @ 6400 RPM) has 353 more horse power than 1977 Mazda 121. (86 HP @ 4800 RPM) In normal driving conditions, 2013 BMW 5 Series should accelerate faster than 1977 Mazda 121. With that said, vehicle weight also plays an important factor in acceleration. 2013 BMW 5 Series weights approximately 1090 kg more than 1977 Mazda 121. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Because 2013 BMW 5 Series is all wheel drive (AWD), it will have significant more traction and grip than 1977 Mazda 121. In wet, icy, snow, or gravel driving conditions, 2013 BMW 5 Series 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, 2013 BMW 5 Series (651 Nm @ 4500 RPM) has 491 more torque (in Nm) than 1977 Mazda 121. (160 Nm @ 3000 RPM). This means 2013 BMW 5 Series will have an easier job in driving up hills or pulling heavy equipment than 1977 Mazda 121.
Compare all specifications:
| 1977 Mazda 121 | 2013 BMW 5 Series | |
| Make | Mazda | BMW |
| Model | 121 | 5 Series |
| Year Released | 1977 | 2013 |
| Engine Position | Front | Front |
| Engine Size | 1970 cc | 4395 cc |
| Engine Cylinders | 4 cylinders | 8 cylinders |
| Engine Type | in-line | V |
| Horse Power | 86 HP | 439 HP |
| Engine RPM | 4800 RPM | 6400 RPM |
| Torque | 160 Nm | 651 Nm |
| Torque RPM | 3000 RPM | 4500 RPM |
| Engine Bore Size | 80.1 mm | 89 mm |
| Engine Stroke Size | 98 mm | 89 mm |
| Engine Compression Ratio | 8.6:1 | 10.0 :1 |
| Fuel Type | Gasoline | Gasoline |
| Drive Type | Rear | AWD |
| Number of Seats | 4 seats | 5 seats |
| Vehicle Weight | 1130 kg | 2220 kg |
| Vehicle Length | 4510 mm | 4999 mm |
| Vehicle Width | 1690 mm | 2132 mm |
| Vehicle Height | 1350 mm | 1559 mm |
| Wheelbase Size | 2520 mm | 3070 mm |
