The Land Rover Discovery is a mid-size SUV, with off-road capabilities. There have been four generations of the vehicle, which was first introduced in 1989.
The new model was based on the chassis and drivetrain of the more upmarket Range Rover, but with a lower price aimed at a larger market segment and intended to compete with Japanese offerings. Pre-1994, the Discovery was available with either the 2.5 litre 200 TDi engine or the 3.5 litre Rover V8. In 1994, many changes were made to the Discovery and reached some markets as "Discovery 2"; the 200Tdi and 3.5 L V8 engines were replaced with the 2.5 L 300TDi 4-cylinder and 3.9 L Rover V8 engines, The newer models featured larger headlamps and a second set of rear lights in the bumper.
Debuted in autumn 1998 Every body panel was new except the rear door outer skin. The rear body was extended to improve load space but at the expense of added rear overhang, which adversely impacted off-road ability. Changes to the diesel engined models saw the 2495 cc Td5 engine introduced, The Td5 engine is often mistakenly attributed to BMW but the engine was derived from the Rover L-Series.
On 2 April 2004, Land Rover introduced the all new Discovery 3. It retained the key features of the Discovery, such as the stepped roofline and steeply-raked windscreen. Land Rover developed a body construction method, marketed as Integrated Body Frame (IBF), where the engine bay and passenger compartment is built as a monocoque, then mated to a basicladder frame chassis for the gearbox and suspension. Land Rover claims IBF combines the virtues of monocoque and ladder-frame – though it makes for a heavy vehice.
Unveiled in the summer of 2009 it is an updated version of the Discovery 3. Using the same Integrated Body Frame structure, the new Discovery has altered front and rear light units and a restyled front grille and bumper to adopt the same smoother, rounder style as also adapted for the 2010 Range Rover The Discovery 4 also retains the body-coloured wheel arches and bumpers as the late D3s . The D4 is the first Discovery model to incorporate Daytime Running Lights. Though the majority of the changes are mechanical. The D4 receives engines from Jaguar Land Rover 'Gen III' range. The TDV6 is a 3-litre development of the 2.7-litre engine used in the D3 and a 5.0lt unit which is not available in the UK or Europe.