Good: Chic and sporty looks plus a classy interior. Enjoyable to drive. Efficient chain cam petrol engines, plenty of scope for personalisation. Well equipped. 99g/km 1.6 TDI from 2011.
Bad: Efficient and pleasant but not overtly sporty.
Good: Five door A1 is more practical with extra interior space. Same efficient engines as the three-door. Desirable image. Enjoyable to drive. At its best with 1.4 TFSI engine.
Bad: Top models are fairly pricey especially when you start adding optional extras. Firm ride on Sport and S Line suspension.
Good: Sharper styled and much improved A3. Comes with low emissions engines. Great looking high quality interior. Refined at speed.
Bad: Limited engine range initially.
Good: Neat cloth-topped, four seater A3 based convertible with decent boot and fold-down rear seats. Best with 2.0 TFSI engine.
Bad: Early 1.9 TDI engine noisy, slow and doesn't suit convertible image. Some problems with early convertible tops and window mechanisms.
Good: More practical version of the A3 has more passenger space and a larger boot. Wide choice of engines including impressive 1.4 TFSI.
Bad: Not the most exciting of designs.
Good: High quality interior with plenty of space. Excellent steering and handling. Available with quattro four-wheel drive. Frugal 2.0 TDI. Improved for 2012 with more efficient engines.
Bad: Very good, but doesn't handle quite as well as a BMW 3 Series. Chain cam 1.8 and 2.0 TFSI more reliable than belt cam diesels.
Good: As good to drive as standard A4 Avant but with quattro four-wheel drive and raised ground clearance. Ideal for towing. Refined and well built.
Bad: Prices new are close to the Q5.
Good: Comfortable and easy to drive. More roomy than previous A4 Avant with up to 1,500 litres of space. 2.0 TDI engine suits it perfectly.
Bad: Original chain cam 160PS 1.8 TFSI engine is thirsty (later improved).
Good: Best looking model in Audi range. quattros enjoyable and sharp to drive. Large boot. 2.0 TDI is punchy but economical.
Bad: Rear seat not as roomy or as comfortable as a 3 Series Coupe. Options can add up to thousands and make used examples difficult to price.
Good: Good looking convertible that effectively replaced the popular A4 Cabriolet. High quality and stylish cabin.
Bad: High number of faults and problems with early models but should be sorted by 2009.
Good: Svelte coupe looks with large hatchback practicality. Plenty of space and headroom in the back. Low emissions from 2.0 TDI 170.
Bad: Firm ride on S line models. Cruise control hidden behind steering wheel. Options quickly add up to thousands and make used examples difficult to price.
Good: Impressive cabin with a straightforward layout. Very quiet and refined on the move. Sat nav and leather seats as standard. Efficient 2.0 TDI. Hybrid from 2012.
Bad: Less standard equipment than previous model and optional extras can very quickly push the price up.
Good: Lighter and more economical than before. Available with immense 3.0 BiTDI engine. Superb quality interior. Refined and smooth ride.
Bad: High starting prices.
Good: Refined and comfortable. 2.0 TDI model averages a claimed 56.5mpg. More headroom than previous A6 Avant. 3.0 BiTDI is stunningly quick and competent.
Bad: Mercedes E-Class Estate has a bigger boot. Less standard equipment than before and options quickly add up to thousands.
Good: Audi's take on a large grand tourer - a sporty version of the A8. Spacious and luxurious interior. A rarity on the roads so ensures exclusivity. 3.0 BiTDI engine with 313PS is immense. Black Edition models available.
Bad: Multitronic CVT in lower powered 3.0 TDI is relaxed but not very responsive.
Good: The ultimate in luxurious travel. Superb refinement and a pleasure to travel in. Good to drive with agile handling. 3.0 TDI offers remarkable economy for such a large car. High-tech and stylish interior.
Bad: Not the most striking of designs.
Good: Stylish. compact SUV in a similar fashion to the Range Rover Evoque. Impressive fuel economy and low CO2. Two and four-wheel drive available.
Bad: Front passenger space tight. Limited range of engines initially. Disconcertingly light steering at low speeds.
Good: Refined and practical. Impressive rear passenger space and decent boot. Good economy from 2.0 TDI. Chain cam 2.0 TFSI. Smooth long distance comfort.
Bad: Optional extras can add tens of thousands, making used examples difficult to price.
Good: Beautifully trimmed cabin, classy image, excellent security rating, strong 3.0 TDI engine.
Bad: Rearmost seats tight for adults. Big size can make it tricky to manoeuvre. 21 inch wheels are easily damaged and require expensive tyre changes.
Good: Stunning looking and hugely desirable supercar. Very quick with secure quattro roadholding. Ride not bone jarring. V10 takes it into another dimension. Used prices getting sensible.
Bad: R tronic semi-auto slow to react to paddles.
Good: The most sensible supercar you could buy. Stunningly quick, yet safe and tractable.
Bad: R Tronic best avoided in favour of manual.
Good: A real blast to drive. Great performance and sound from five-cylinder chain cam 340PS engine, Immense grip and traction from quattro four-wheel drive. Forgiving ride.
Bad: No manual gearbox available. Not cheap at a few pounds shy of £40,000.
Good: Great performance from 450PS normally aspirated V8 engine, quattro as standard, huge amounts of grip and traction, a real quality feel throughout.
Bad: Lacks the raw edge you'd expect given it's an RS4.
Good: Thunderous performance from lovely V8 engine, purposeful styling, amazing handling and traction, the usual high quality you'd expect from Audi throughout.
Bad: Not available as a manual which may put off some enthusiasts.
Good: New RS6 gets less powerful 4.0-litre V8 rather than 5.0-litre V10 of its predecessor but has faster acceleration and better economy.
Bad: Expected to cost more than £75k.
Good: Powered by uprated 2.0 TFSI engine with 300PS. Quattro four-wheel drive means superb traction. Lighter weight helps economy with an official 40mpg.
Bad: Subtle rather than overtly sporty looks.
Good: Effortless performance from 4.0-litre V8 engine. Available as a saloon or Avant. Fuel economy improved over previous S6. Refined ride for a performance car.
Bad: Somewhat lacking the excitement you'd expect from an Audi S model.
Good: Great blend of refinement, quality and performance. Lovely sound from twin turbo V8 engine. Feels nimble for what is a large car. Relatively efficient given the power it offers.
Bad: More economical 3.0 BiTDI feels just as quick in everyday driving.
Good: High performance S8 gets twin turbo V8 with 520PS.
Bad: Not cheap at more than £75k.
Good: Enjoyable to drive. Nicely detailed cabin. Impressive engines. Frugal TDI available. TTS is a great performance car. Very few reported problems over 7 years.
Bad: Rear seats pointless for passengers. V6 is thirsty and not worth the extra.
Good: As sharp a drive as the coupe version, eye-catching looks and nice design details in the cabin. Good range of engines including economical TDI. Very few reported problems over 7 years.
Bad: Stiff ride ride on 19-inch wheels unless magnetic suspension is fitted. Blustery with top down.
Good: Characterful and powerful chain cam five-cylinder engine, yet friendly to drive at low speed. Sporty cabin, available as a Coupe or a Roadster.
Bad: Expensive compared to the rest of the TT range, not as involving to drive as the similarly priced Porsche Cayman.