The petrol V8 is more robust and unlikely to give you any worries beyond regular servicing, but the automatic gearbox is a concern. Land Rover used both a GM5 auto ’box and then a ZF unit in later models and both are prone to complete failure. Some of this is down to the gearboxes supposedly being sealed for life, but they often fail at the 60,000-mile mark, so a precautionary fluid change every four years or 50,000 miles is advisable. Land Rover has changed many L322 gearboxes under warranty and the most recent models will still be covered, while older versions may qualify for some goodwill on the part of the dealer.
In 2005, the Range Rover’s petrol engine was replaced with another 4.4-litre V8, this time a Jaguar-sourced normally aspirated unit with the same capacity as the BMW motor. However, power swelled to 306hp at 5750rpm and 313lb ft of torque at 4000rpm, delivering 0-62mph in 8.7 seconds and a 124mph maximum speed. Fuel consumption improved to 18.9mpg with the five-speed auto retained.
However, Land Rover also borrowed Jaguar’s supercharged 4.2-litre motor from the S-type R and XJR. This 4196cc has an Eaton supercharger to give 400hp at 5750rpm, 413lb ft of torque at 4000rpm, 0-62mph in 7.5 seconds and 130mph. Economy comes in at 17.6mpg and it also has a five-speed auto.
The new TDV8 3.6-litre turbodiesel replaced the TD6’s five-speed gearbox with a new six-speed item. It was better married to the new 3630cc engine’s 272hp peaking at 4000rpm and 472lb ft at 2000rpm, which finally delivered decent performance of 0-62mph in 9.2 seconds and a 124mph maximum. Average economy of 25.4mpg made it the more popular choice by far with new buyers.
Again, these engines are all tough and reliable but are let down by their gearboxes. Check for any abrupt changes from one gear to the next and also be sure the car selects reverse cleanly with no shunting as you back up the car.
April 2009 heralded the arrival of the 5.0-litre supercharged petrol V8, replacing the 4.2 unit with a 4999cc engine that gives 510hp at 6000-6500rpm and 461lb ft of torque. With a new six-speed automatic gearbox, the 5.0 S/C saw off 0-62mph in 6.2 seconds and heads on to 140mph, while it also improves economy to 22.7mpg. The normally-aspirated V8 was finessed to increase torque to 325lb ft at 2000rpm and 24.2mpg, as well as 0-62mph in 7.6 seconds and a 130mph top speed.
The biggest news, though, came in June 2010 with the arrival of the 4.4-litre TDV8. This 4367cc turbodiesel had 313hp at 4000rpm and torque of 516lb ft spread between 1500- and 3000rpm. As well as 0-62mph in 7.8 seconds and 124mph, it offers 30.1mpg to be the most rounded L322 model. Even so, gearbox troubles persist with the new eight-speed ZF unit, so check the service record carefully.