2009 Ford Flex vs. 1987 Ford Sierra
To start off, 2009 Ford Flex is newer by 22 year(s). Which means there will be less support and parts availability for 1987 Ford Sierra. In addition, the cost of maintenance, including insurance, on 1987 Ford Sierra would be higher. At 3,496 cc (6 cylinders), 2009 Ford Flex is equipped with a bigger engine. In terms of performance, 2009 Ford Flex (262 HP @ 6250 RPM) has 149 more horse power than 1987 Ford Sierra. (113 HP @ 5300 RPM). In normal driving conditions, 2009 Ford Flex should accelerate faster than 1987 Ford Sierra. With that said, vehicle weight also plays an important factor in acceleration. 1987 Ford Sierra weights approximately 124 kg more than 2009 Ford Flex.
Let's talk about torque, 2009 Ford Flex (336 Nm @ 4500 RPM) has 156 more torque (in Nm) than 1987 Ford Sierra. (180 Nm @ 3000 RPM). This means 2009 Ford Flex will have an easier job in driving up hills or pulling heavy equipment than 1987 Ford Sierra.
Compare all specifications:
| 2009 Ford Flex | 1987 Ford Sierra | |
| Make | Ford | Ford |
| Model | Flex | Sierra |
| Year Released | 2009 | 1987 |
| Engine Position | Front | Front |
| Engine Size | 3496 cc | 2294 cc |
| Engine Cylinders | 6 cylinders | 4 cylinders |
| Engine Type | V | in-line |
| Horse Power | 262 HP | 113 HP |
| Engine RPM | 6250 RPM | 5300 RPM |
| Torque | 336 Nm | 180 Nm |
| Torque RPM | 4500 RPM | 3000 RPM |
| Fuel Type | Gasoline | Gasoline |
| Number of Seats | 7 seats | 5 seats |
| Number of Doors | 5 doors | 5 doors |
| Vehicle Weight | 966 kg | 1090 kg |
| Vehicle Length | 5130 mm | 4400 mm |
| Vehicle Width | 1930 mm | 1680 mm |
| Vehicle Height | 1730 mm | 1370 mm |
| Wheelbase Size | 3000 mm | 2620 mm |
| Fuel Tank Capacity | 70 L | 45 L |
