What is it?
It’s the diesel-sipping version of Audi’s recently relaunched mid-sized estate, the A4 Avant. ‘Ultra’ is Ingolstadt’s eco label, and there are two engines to choose from in the Ultra range: 148bhp and 187bhp versions of the familiar 2.0-litre four-cylinder diesel.
We’re driving the former, paired with a six-speed manual gearbox, although the seven-speed dual-clutch automatic alternative returns identical combined fuel economy and emissions figures of 70.6mpg and 104g/km of CO2. These aren’t quite the headline-grabbing stats of the saloon version (which gently exhales just 99g/km of CO2) but they’re still excellent, and the 187bhp version isn’t far behind at 68.9mpg and 106g/km.
You can buy the lowered-powered car in either SE or - as driven here - Sport spec, whereas the pokier variant comes only in Sport. Both achieve their commendable parsimony with the help of low-resistance tyres on 17in wheels and 20mm-lowered Sport suspension borrowed from the S line range.
What's it like?
If Audi has sacrificed any engine refinement in favour of fuel efficiency, it barely shows. Yes, there is a definite chug at idle, and the start-stop reignites the engine with a jiggly flourish, but at 1mph and above, the engine’s manners really impress. Going up through the gears, its note is muted and its timbre smooth. It gets louder at the top end, but not disruptively so, and at 1800rpm in sixth gear at 70mph there’s almost no noise.
Outright performance won’t satisfy everyone; the 148bhp car can manage no better than 9.2sec to 62mph. But in normal driving the engine’s conservative tune only really tells when you’re hoping for an in-gear overtake. It’ll pull comfortably from 1600rpm and strongly from 2250rpm, subject to a moment of lag, and while the relatively short-throw gearshift is happiest with gentle movements, it allows more aggressive changes, too. There’s next to no feel from the middle pedal, but the stoppers are at least effective and progressive.
The marriage between a low-powered, motorway-oriented powertrain and stiffened suspension isn’t a natural one, but on 50-profile tyres and 17in wheels the disruption to ride quality is limited to some tolerable bobbling at medium to high speeds (including on the motorway) and the urban ride, while firm, isn’t harsh.