Return to main story.The 'Quadrifoglio Verde' versions of the MiTo and Giulietta are distinguished by the legendary emblem which has traditionally been bestowed upon the best Alfa Romeos, drawing on the heritage of performance without compromising efficiency, the environment and daily convenience.The 173kW 'Quadrifoglio Verde' Giulietta 1750 TBi offers the most high-performance engine in the line-up and a specific sports set-up for driving pleasure with limited fuel consumption and emissions.PURE POWERThe 1750 TBi makes 195Nm/litre and 340Nm at 1900rpm. The engine features direct petrol injection, dual continuous variable valve timing, a turbocharger and a 'scavenging' control system that eliminates 'turbo lag'.The MiTo 'Quadrifoglio Verde' 1.4 MultiAir Turbo model also ensures nifty performance with 92kW /litre which the Italian automaker claims is one of the highest readings in the world and a chassis worthy of a higher category. The engine’s highlight though is its weight/power ratio (6.7kg/kW), which has always been one of the key factors behind the success of Alfa Romeo cars on the road and the race track.The 'Quadrifoglio Verde' MiTo and Giulietta versions have played the role of official safety cars in the SBK Superbike World Championship seasons. Alfa Romeo has been linked to the sport since 2007 as main sponsor. The MiTo SBK Limited Edition 1.4 170 HP QV takes up the batom at the 2013 series as the new safety car.Read next story.