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B.A.T. Alfa Trinity, some of the world's most famous concept cars, are up for auction

Of the cars that never saw production, there are a handful that nevertheless have had an outsized influence. Among the most famous are the wild Berlinetta Aerodynamica Technica (B.A.T.) concepts commissioned by Alfa Romeo in the mid-1950s. Three B.A.T. Alfas were created by Italy's Bertone design house and were unveiled at succeeding Turin auto shows in 1953, '54, and '55. The cars are now coming up for auction for the first time as a group at RM Sotheby's Contemporary Art Evening Auction in New York on October 28. The first of the trio was B.A.T. 5, which like its successors was built on the Alfa 1900 Sprint production chassis. The goal of the B.A.T. 5 was aerodynamic efficiency, and the car boasted a cD of 0.23. Aiding the cause were covered front wheels, a greenhouse with steeply curved side glass, and twin tail fins. The second concept was B.A.T. 7, from 1954. It has the wildest styling of the trio, with sharply curved tail fins. It also has the lowest drag coefficient, at 0.19. B.A.T. 9, from 1955, was the most production-feasible of the group. It features an Alfa Romeo shield grille at the front and exposed headlights with clear covers. All three are credited to Franco Scaglione, working with Nuccio Bertone. They were seen together for the first time at the 1989 Pebble Beach Concours d'Elegance. They would appear together again at Pebble Beach in 2005 and at Bertone's 80th-anniversary celebration in 1992. The cars were acquired by a single owner sometime after their first Pebble Beach appearance. The ability to acquire all three at once is part of what makes this an extraordinary opportunity. The B.A.T. Alfas are being sold as a single lot and are expected to bring between $14 million and $20 million.

Everything we know about the Alfa Romeo Stelvio

Alfa Romeo is working rapidly on putting a crossover onto the road and these latest awkwardly-shaped spy shots are our best look at the upcoming Stelvio. Crossovers and compact SUVs are still outrageously popular with Americans and Alfa Romeo wants in on the ever-growing segment. The upcoming Stelvio, then, would make Alfa more profitable and make the storied brand once again a household name. Here's an overview of everything we know about the Stelvio. October 24, 2016: A moderately-camouflaged Stelvio is spotted testing in broad daylight with minimal updates. The most recent prototype has three strangely-shaped ridges on the hood, while the headlights and taillights, despite being taped off, still appear to be taken straight from the Giulia sedan. The profile mimics that of the Porsche Macan with the bulbous rear end gaining massive exhaust tips. View 12 Photos October 11, 2016: Photographers captured a lightly-camouflaged Stelvio testing in Europe at night, giving us our best look at the SUV's design. The front of the vehicle shares the same front fascia design as the Giulia sedan with two oval-shaped inlets on the side and the automaker's iconic rounded-triangle grille. The headlights also appear to be the same slit-like units on the Giulia, as well. The side profile of the SUV portrays a rounder design than displayed on previous prototypes that photographers have spotted. At the rear, two small tail pipes protrude out of the vehicle, while the taillights appear to be similar to the Giulia's, too. Unsurprisingly, the Stelvio looks comparable to a Giulia on stilts. View 7 Photos June 28, 2016: A prototype of the Stelvio is spotted wearing a massive amount of camouflage, making the shape and overall design of the SUV hard to discern. Again, the automaker's well-known front end is easy to spot, as are the two large exhaust outlets at the back. The rear end, though, features an interesting, rakish design that is more in line with a Sportback than a SUV. Photographers also managed to get pictures of the SUV's interior, which featured birch-like wood, an integrated screen, and large paddle shifters behind the thick steering wheel. Just like on the Giulia, the start-stop button is mounted directly onto the steering wheel. View 10 Photos April 7, 2016: The Alfa Romeo Stelvio is spotted testing for the first time. Alfa Romeo was caught testing a heavily-camouflaged prototype of the Stelvio wearing an insane amount of unsightly black plastic.

2017 Alfa Romeo Giulia still makes us swoon

It may have debuted in June, but Alfa Romeo's hot new Giulia makes its first public appearance at the 2015 Frankfurt Motor Show this week. And even though we've told you all there is to know right now, we just can't resist bringing you another set of photos, and another round of praise. Alfa is once again showing the Giulia in top-of-the-line Quadrifoglio spec, complete with a twin-turbocharged V6 that's said to make around 510 horsepower. We already know it sounds awesome, and all we can say is, watch out BMW M3. Alfa Romeo is quoting a 0-62 time of less than four seconds, and we're told the car will have the quickest steering in its class. Sounds good to us. The Giulia will officially launch in early 2016, and while the top-trim Quadrifoglio will probably start around $70,000 or $75,000, less-aggressive, more mainstream models will also be available. There's talk of four-cylinder power with both gasoline and diesel motivation, but it's unclear exactly what's in sore for the US-spec car. Still, it's exciting to see the new Giulia, and we're eager to drive Alfa's latest when it goes on sale next year. <p>Your browser does not support iframes.</p> Related Video: