Alfa Romeo has given the Giulia (and Stelvio) Quadrifoglio… ten more horsepower

Alfa Romeo has revealed new, more powerful anniversary editions of its rather delectable Giulia and Stelvio Quadrifoglio models, each packing a boosted version of that even more delectable 2.9-litre turbo V6.

As standard, and when in full working order, that V6 produces 503bhp. What you’d impolitely classify as ‘really bl**dy fast’. These new ‘Quadrifoglio 100 Anniversario’ cars, which to nobody's surprise celebrate 100 years since the original Quadrifoglio badge made an appearance, get an additional… ten horsepowers.

You could get that much from skipping breakfast, or indeed sticking a badge on the mudguards – which of course both cars have – but then again, a newly liberated 513bhp, just 20bhp down from the madcap Giulia GTA - should still feel… really quick, and wrapped up in a new green hue should remain both a delightfully well-rounded super-saloon and sports SUV.

That additional ten horsepower is matched to another goody for both cars – a mechanical limited slip diff, taking its tune from that wild Giulia GTA. Alfa is claiming better traction and ‘behaviour’, better torque transfer and ‘speed in bends’. Certainly worked a treat on the GTA and GTAm, as you can read about here. And as you’ll see here, there are new full LED headlights specifically added to the 100th Anniversario cars, along with gold brake calipers and those aforementioned Quadrifoglio emblem on the mudguards.

The front grille and mirrors get a carbon finish too, while inside it’s a heady combination of black and Alcantara leather with gold stitching, a ‘3D finish’ for the carbon adorning the instrument panel, and a new digital instrument cluster. The steering wheel gets leather and Alcantara, and there’s the obligatory ‘100’ stitched into the dash. In gold.

Just 100 versions of both the Giulia and Stelvio will be built to celebrate this anniversary, marking 100 years almost to the day that Ugo Sivocci won the 1923 Targo Florio in a specially built Alfa RL decked out with that famous four-leaf clover. Not that we’re being fussy, but 100 extra horsepowers on the 100th anniversary of said clover wouldn’t have gone amiss…