The Discovery 4 (called the LR4 in North America and The Middle East) 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 adopted for the 2010 Range Rover and Range Rover Sport.
The Discovery 4 also retains the body-coloured wheel arches and bumpers as the late Discovery 3s (early D3s had black plastic trim).
Optional Daylight Running Lamps can be specified whilst LED lights feature prominently in both front and rear lamp units.

The majority of the changes are mechanical, with reliability issues addressed, improvements to engines and gearboxes, brake and suspension refinements, but also included major interior upgrades with a more luxurious and contemporary interior with greater luxury and technology levels available.
The D4 receives two engines from Jaguar Land Rover's Gen III range.
The TDV6 Gen III is a 3.0-litre development of the 2.7-litre engine used in the D3.
The new version features advanced twin-sequential turbochargers where a Variable geometry turbocharger is used at low engine speeds, with a second standard turbo is brought online at higher engine speeds.
Two versions of the 3.0-litre diesel are offered.
Fuel economy was improved over the previous generation diesel while power, torque and diesel NVH were improved significantly.
This system provides greater output than the older engine, with 241 bhp (180 kW) and 600 N⋅m (440 lb⋅ft) whilst reducing CO
2 emissions by 10 percent when first introduced and in 2014 increased to 188 kW (252 hp).
The Gen III version of the V8 petrol engine (available in markets outside the UK such as North America, Russia, Japan, Australia, and some EU countries) is now a 5-litre unit with Direct Petrol Injection developing 385 bhp (287 kW) and 520 N⋅m (380 lb⋅ft).

An improved version of the ZF six-speed automatic/sequential gearbox was incorporated and in 2012(2014 in the US) was further improved including a change to 8 speeds.
It includes taller gearing to take advantage of the new engines' greater torque output and an updated lock-up system to further reduce fuel consumption.
Other technical changes include the fitting of the more powerful brakes from the Range Rover Sport and thicker anti-roll bars to improve on-road handling.
The Stability Control System now includes a programme that detects the onset of understeer and applies the brakes.
The Discovery 4 retains its predecessor's fully independent air suspension with cross-linking when off-road and the twin-range transfer gearbox with an electronic infinitely variable locking centre differential.
As before, a similar locking rear differential is available.
The Terrain Response system remains but with two new features – the 'Sand' mode incorporates a new traction control mode to prevent loss of traction when starting off and stopping in soft sand, and the 'Rock Crawl' mode gains a feature that applies gentle brake pressure at low (less than walking pace) speeds to improve grip and stability on slick rock.
The system is also 'retuned' to account for the new engines and gearboxes with their different torque characteristics.
Other new electronic systems include Trailer Stability Assist which can adjust the throttle and brakes to prevent a dangerously swaying trailer.

The 2.7-litre TDV6 engine was available in Europe on the basic 2.7 GS passenger and 2010 Commercial ranges.
Unlike the Discovery 3 base model, this was equipped with air suspension and the Terrain Response system.
The automatic gearbox was an option on this model.
The 3.0-litre Gen III model (only with automatic gearbox) is also available in the GS trim level.

The Discovery 4 also features a redesigned interior (in keeping with the new styles introduced elsewhere in the LR range for 2010).
The instrument cluster is updated with redesigned analogue speedometer and tachometer gauges for improved clarity.
The analogue temperature/fuel gauges of the previous model and the electronic informatio
The Discovery 4 (called the LR4 in North America and The Middle East) 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 adopted for the 2010 Range Rover and Range Rover Sport. The Discovery 4 also retains the body-coloured wheel arches and bumpers as the late Discovery 3s (early D3s had black plastic trim). Optional Daylight Running Lamps can be specified whilst LED lights feature prominently in both front and rear lamp units.
The majority of the changes are mechanical, with reliability issues addressed, improvements to engines and gearboxes, brake and suspension refinements, but also included major interior upgrades with a more luxurious and contemporary interior with greater luxury and technology levels available. The D4 receives two engines from Jaguar Land Rover's Gen III range. The TDV6 Gen III is a 3.0-litre development of the 2.7-litre engine used in the D3. The new version features advanced twin-sequential turbochargers where a Variable geometry turbocharger is used at low engine speeds, with a second standard turbo is brought online at higher engine speeds. Two versions of the 3.0-litre diesel are offered. Fuel economy was improved over the previous generation diesel while power, torque and diesel NVH were improved significantly. This system provides greater output than the older engine, with 241 bhp (180 kW) and 600 N⋅m (440 lb⋅ft) whilst reducing CO
2 emissions by 10 percent when first introduced and in 2014 increased to 188 kW (252 hp). The Gen III version of the V8 petrol engine (available in markets outside the UK such as North America, Russia, Japan, Australia, and some EU countries) is now a 5-litre unit with Direct Petrol Injection developing 385 bhp (287 kW) and 520 N⋅m (380 lb⋅ft).
An improved version of the ZF six-speed automatic/sequential gearbox was incorporated and in 2012(2014 in the US) was further improved including a change to 8 speeds. It includes taller gearing to take advantage of the new engines' greater torque output and an updated lock-up system to further reduce fuel consumption. Other technical changes include the fitting of the more powerful brakes from the Range Rover Sport and thicker anti-roll bars to improve on-road handling. The Stability Control System now includes a programme that detects the onset of understeer and applies the brakes. The Discovery 4 retains its predecessor's fully independent air suspension with cross-linking when off-road and the twin-range transfer gearbox with an electronic infinitely variable locking centre differential. As before, a similar locking rear differential is available. The Terrain Response system remains but with two new features – the 'Sand' mode incorporates a new traction control mode to prevent loss of traction when starting off and stopping in soft sand, and the 'Rock Crawl' mode gains a feature that applies gentle brake pressure at low (less than walking pace) speeds to improve grip and stability on slick rock. The system is also 'retuned' to account for the new engines and gearboxes with their different torque characteristics. Other new electronic systems include Trailer Stability Assist which can adjust the throttle and brakes to prevent a dangerously swaying trailer.
The 2.7-litre TDV6 engine was available in Europe on the basic 2.7 GS passenger and 2010 Commercial ranges. Unlike the Discovery 3 base model, this was equipped with air suspension and the Terrain Response system. The automatic gearbox was an option on this model. The 3.0-litre Gen III model (only with automatic gearbox) is also available in the GS trim level.
The Discovery 4 also features a redesigned interior (in keeping with the new styles introduced elsewhere in the LR range for 2010). The instrument cluster is updated with redesigned analogue speedometer and tachometer gauges for improved clarity. The analogue temperature/fuel gauges of the previous model and the electronic informatio
Land Rover Discovery