The Alfa Romeo Guilia Quadrifoglio is a 505-horsepower Italian challenge to everything BMW holds dear

Buying a high-performance luxury sedan in the United States in 2017 isn't difficult. You really don't have to think about it. If you have the means, Mercedes, Lexus, Audi, Cadillac, and BMW have you covered.

Especially BMW. The Bavarians created the sports sedan and brought it to America back in the 1970s. Ever since then, BMW has improved on the idea, to the point where its 3-Series is the platonic ideal of four-door go-fastness. If you move up the M-Sport M3 from BMW's performance division, you get the platonic ideal with fire in its belly.

The default choice is therefore obvious. But the default can be boring, and that's where Alfa Romeo comes in.

The Italian brand is returning to the US after a long absence. Alfas of old were stylish - just think about the convertible from "The Graduate" - but not exactly reliable. Fans put up with this until they didn't and a surge of dependable Japanese and superbly crafted German vehicles arrived.

Alfa started small and weird with the 4C, effectively a small Ferrari (Alfa and Ferrari used to live under the same room at Fiat, before Ferrari was spun off in an IPO in 2015). We liked the 4C, but it was quirky.

Enter the Guilia, a proper sports sedan. Alfa just started selling it. And also enter the Quadrifoglio performance upgrade. "Quadrifoglio" means "four-leaf clover" in Italian, and the meaning of that totem of good luck for Alfa is nicely explained here by Petrolicious's Michael Banovsky. Suffice it to say that the green badge on the Guilia Quadrifoglio adds something truly special.

Alfa tossed us the keys to the car for a week and we put it through its paces. So how did this $77,125 (as tested) challenger to the BMW M cars stack up?

Read on:

Photos by Hollis Johnson.