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The 3.0-litre V6 TDI engine isn’t that quiet, either, but it’s sportily gruff so considerably more pleasant. The 216bhp output means its 0 to 60mph time is trimmed to 6.8 seconds and it does
feel brawnier on the road, while still not being rocket-like. The larger engine and extra performance compromises economy but 57.6mpg and 128g/km aren’t exactly wallet-wilting. With
concerns over air quality and significant efficiency improvements in recent years, potential owners might be more tempted by a petrol-engined A5 Cabriolet than they have for years and there
are three alternatives. The 2.0-litre unit is available with two different power ratings. The base 188bhp version enables a 7.7-second 0 to 60mph sprint, while it can still manage 50.4mpg
and emits 127g/km when mated to the S tronic automatic gearbox. A smooth engine results in the kind of relaxed and leisurely driving experience that many convertible owners are looking for.
The same engine is also available with 249bhp, bringing the 0 to 60mph time down to 6.1 seconds and reducing the fuel consumption to 44.8mpg, while emissions are increased to 144g/km. It
does feel tangibly quicker, though, while the engine retains its smoothness. Topping the range is the even sportier S5, powered by a 3.0-litre turbo V6 that has an added element of snarl to
its sound when prodded into life. The 350bhp on tap means a 5.0-second 0 to 60mph time, which is pretty swift and takes the S5 into sports car territory. Fuel economy takes a bit of dive
though to 36.2mpg and emissions climb to 177g/km. It’s not a hardcore sports car but its performance adds extra fun. The A5 Cabriolet as a four-seater is built for cruising, rather than
out-and-out sporty driving, and it suits the role. It feels settled on the road, well balanced and with just the right amount of agility. The steering is accurate; it grips the road well,
especially when fitted with the quattro four-wheel drive, and the body feels controlled and flat in the corners. All in all, it’s relaxed and comfortable. The S5 is a little more nimble:
sharper in the corners and slightly more keen to run in a sporty manner but essentially it’s a cruiser rather than a bruiser. The cabin is comfortable for two, while the two rear seats offer
just enough space for adults but not, perhaps, for a long trip. The 380-litre boot (320 with the roof stowed away) is perfectly adequate for two people’s luggage but it’s a stretch for
four. Standards of fit, finish and materials are exemplary and all the latest connectivity and infotainment technology is on board, although some of it is optional and quickly adds to the
cost of the car. With prices starting at £35,235 (£51,835 for the S5), the A5 Cabriolet is in the premium category, alongside the BMW 4-Series and Mercedes-Benz C-Class Cabriolet. It’s
perhaps not quite as sharp to drive as the BMW but it has all the comfort and technology its buyers will want. It is, in short, ideal for those who like to show off. But in an understated
way. * Price: £35,235 – £51,835 * Engine range: Turbo-petrol – 2.0, 2.0 249bhp, 3.0-litre; Turbo-diesel – 2.0, 3.0-litre * Power: 0-60mph in 5.0 seconds, 155mph top speed (3.0 petrol) *
Fuel economy: 62.8mpg (2.0TD) * CO2 emissions: 118-177g/km * Rivals: BMW 4-Series, Mercedes-Benz C-Class, Vauxhall Cascada * Rating: 8/10