1991 Ford Sierra vs. 1999 Mercury Cougar
To start off, 1999 Mercury Cougar is newer by 8 year(s). Which means there will be less support and parts availability for 1991 Ford Sierra. In addition, the cost of maintenance, including insurance, on 1991 Ford Sierra would be higher. At 1,983 cc (4 cylinders), 1999 Mercury Cougar is equipped with a bigger engine. In terms of performance, 1999 Mercury Cougar (123 HP @ 5500 RPM) has 48 more horse power than 1991 Ford Sierra. (75 HP @ 4500 RPM) In normal driving conditions, 1999 Mercury Cougar should accelerate faster than 1991 Ford Sierra. With that said, vehicle weight also plays an important factor in acceleration. 1999 Mercury Cougar weights approximately 165 kg more than 1991 Ford Sierra. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Let's talk about torque, 1999 Mercury Cougar (176 Nm @ 4000 RPM) has 24 more torque (in Nm) than 1991 Ford Sierra. (152 Nm @ 2200 RPM). This means 1999 Mercury Cougar will have an easier job in driving up hills or pulling heavy equipment than 1991 Ford Sierra.
Compare all specifications:
| 1991 Ford Sierra | 1999 Mercury Cougar | |
| Make | Ford | Mercury |
| Model | Sierra | Cougar |
| Year Released | 1991 | 1999 |
| Engine Position | Front | Front |
| Engine Size | 1751 cc | 1983 cc |
| Engine Cylinders | 4 cylinders | 4 cylinders |
| Engine Type | in-line | in-line |
| Horse Power | 75 HP | 123 HP |
| Engine RPM | 4500 RPM | 5500 RPM |
| Torque | 152 Nm | 176 Nm |
| Torque RPM | 2200 RPM | 4000 RPM |
| Engine Compression Ratio | 21.5:1 | 9.7:1 |
| Fuel Type | Diesel | Gasoline |
| Number of Seats | 5 seats | 4 seats |
| Number of Doors | 4 doors | 2 doors |
| Vehicle Weight | 1145 kg | 1310 kg |
| Vehicle Length | 4430 mm | 4710 mm |
| Vehicle Width | 1700 mm | 1770 mm |
| Vehicle Height | 1370 mm | 1330 mm |
| Wheelbase Size | 2620 mm | 2710 mm |
