Audi is continuing is electrification strategy in the premium compact class, hence the emphasis on the MHEV mild hybrid 1.5-litre 35 TFSI petrol S tronic model in this MK4 A3 Sportback model range. The figures suggest that this variant manages 50.4mpg, with a CO2 return of 128g/km of CO2. That compares well to the figures of the conventional version of this engine allied to a manual gearbox (48.7mpg and 132g/km). The 35 TDI diesel S tronic auto model manages 62.8mpg and 119g/km. Most A3 buyers will want the MHEV auto petrol model which uses the same sort of set-up we've already seen on larger Audi models. A 'BAS' belt alternator starter-generator that with this four cylinder engine, powers a 48-volt main electrical set-up in which a compact lithium-ion battery in the boot stores energy harvested via a 'KERS' kinetic energy recovery system. During braking, the 'BAS' package can recover up to 12kW of power and feed it back into the battery. If the driver takes their foot off the accelerator at speeds between 34 and 99mph, the mild hybrid system will recuperate energy, while the car rolls in idle or coasts with its engine automatically switched off for up to 40 seconds. The belt alternator starter-generator restarts the engine the next time the accelerator is depressed, and does so faster and more gently than a conventional starter. All of this you'll particularly notice at urban speeds where the engine start-stop system is cutting in and out. The start stop range begins at just under 14mph, so you'll often find the car coasting up to the end of a traffic queue, a traffic light or a level crossing.
SUMMARY
In the search for a compact car that's also a premium purchase, there are probably more charismatic choices than this Audi A3. But we think there are few better ones. Light in bulk, heavy in technology, it's a logical evolution of a breed that's long been one of Britain's favourite company cars. This improved version might look little different at first glance but it'll feel so once you get to grips with the fresh digitalised cockpit with its two sophisticated screens. Otherwise, things are much as before - which means that there's lot's to like. If you're one of those still questioning the need for a premium peoples' hatch, then in this Audi, you have your answer. From the outside, it's as home in Belgravia as it is in Brixton. But the interior is where this design really strides apart. You could be in a luxury car. And of course, in many ways, you are. By pioneering the premium compact hatch segment with original versions of this model, Audi has in many ways redefined the meaning of automotive luxury, democratising it without the desirability being diluted. Other brands claim to have done the same of course and many have used a few more visual or dynamic fireworks to grab the attention. Ingolstadt though, doesn't think this A3 needs them and legions of loyal global buyers seem to agree. Cool, class-less and clever, it remains desirably definitive.
