The updated Giulietta QV model gets the 237bhp 1.75-litre aluminium turbocharged petrol engine from the Alfa Romeo 4C coupe, as well as its TCT 6-speed duel-clutch gearbox. This engine produces 340Nm of torque and can now reach a top speed of 149mph and go from 0-62mph in just 6.6 seconds - 0.2 seconds faster than the previous version.
There's a new intake system too to improve the exhaust noise, and some interior accessories to differentiate the QV from the standard car. Large exhaust pipes, a rear splitter and new 17- or 18-inch alloy wheels mark it out from the normal Giulietta.
Inside, there's a new steering wheel and dials, QV logos and leather and Alcantara sports seats, alongside all the new features from the top-spec 2014 Giulietta model.
There's also a new matt Magnesio Grey paint option that's exclusive to the 500 'Launch Edition' models that are planned. The other paint colours include Alfa Red and Competizione Red.
The new Alfa Romeo MiTo Quadrifoglio Verde gets a 168bhp 1.4-litre MultiAir turbo petrol, which means it goes from 0-62mph in 7.3 seconds and on to a top speed of 136mph.
Despite that, it will still manage 52mpg and emits 124 g/km of CO2, thanks to the new TCT gearbox and a stop-start system.
The MiTo QV gets a new rear spoiler and 17-inch alloy wheels with red brake calipers, as well as the option of the matt Magnesio Grey paint. It also features leather upholstery, QV logos and a 'carbon look' dashboard.
The new Alfa Romeo Giulietta and MiTo Quadrifoglio Verde models will make their public debut at the Geneva Motor Show and will go on sale in the UK in May. There's no word on pricing yet but expect these new models to cost around £29,000 for the Giulietta and £24,000 for the MiTo.