Audi A8

   The Audi A8 of the second generation is produced since 2004. It was also slightly restyled in 2005.

   The entry-level 3.0-liter V6 petrol was replaced by a new 3.2-liter FSI unit. It has a strong performance, while the 3.7- and 4.2-liter petrols are even more punchier. There is also a refined 6.0-liter W12 unit, which develops 450 hp and delivers impressive performance. Also there was introduced a 4.2-liter diesel engine. Currently it is the most powerful diesel, Audi has offered in a passenger car. A pick of the bunch would be a modest 3.0-liter TDI, which is smooth, refined and the most fuel efficient. All models, except the 3.2-liter, are completed with an all-wheel-drive through a six-speed automatic gearbox with an option of sequential manual shifts.

   Audi's adaptive air-suspension system has four settings. It handles tidily for it's size. Audi's A8 speed-sensitive power steering makes it easy to drive in town, but it is short on feedback at higher speeds. Body control is good for such a big car.

   Cabin of the A8 is well isolated from the outside noises. Road noise is absent, while minimal wind noise at motorway speed is only noticeable because of the absence of any other noises. Even under hard acceleration engines issue only subdued growl.

   The Audi A8 is more affordable than it's BMW and Mercedes rivals, but it isn't cheap. Petrol engines return poor fuel economy, although things are better with diesels. Residual values cannot match the Mercedes-Benz S-class. Servicing is also expensive, but most of the mechanical components are revised of the previous car's, so should be trouble-free.

   The Audi A8 has an excellent build quality. Inside the cabin there is a rock solid feel and all the materials are of excellent quality. All the main controls and instruments are easy to reach. However a single knob for the stereo, satellite navigation and suspension settings takes time to get used to.

   Driver's position has electric adjustments for the steering wheel and the seat. The seat itself is comfortable and supportive.

   The Audi A8 has a huge interior space, especially in the extended wheelbase model. Head- and legroom for all the occupants is superb. Even tall persons can stretch out on the rear seats in absolute comfort. The boot is deep, long and well shaped.

   This car comes with all the safety equipment you would expect from an executive sedan. Eight airbags are fitted as standard across the range, as well as anti-lock brakes with electronic brakeforce distribution and stability control. Security equipment is comprehensive too.

   Even the entry-level models of the Audi A8 are fitted with a leather trim, climate control, satellite navigation, parking sensors, CD changer, alloy wheels and voice controls. Top of the range models are completed with sportier suspension and trim.

   Production of the Audi A8 still continues.

   Advantages: One of the most handsome cars in this class and big on refinement. Superb build and masses of cabin space.

   Disadvantages: Some buyers will prefer the image and presence of a Jaguar or Mercedes. Pricey to run.

   Verdict: The Audi A8 now ranks among the very best luxury cars.

   Also consider: BMW 7-series, Mercedes-Benz S-class.