10 Underrated Cars of Barrett-Jackson Scottsdale 2015

There are certain types of cars that get all the attention at the Barrett-Jackson Scottsdale auction -- classic muscle cars, one-off customs, and old factory prototypes.

We scoured the action listings for vehicles that might fly under the radar, from cheap classics, to rare race cars, to anything else that's not an old Corvette. Below, find our picks for the 10 most underrated cars of Barrett-Jackson 2015.

10.) 2000 Lotus Esprit Twin Turbo

Lotus. V8. Twin turbo. Less than 35,000 miles. What more do you need to know? Well, if you watched the recent Top Gear Patagonia Special, you'd know that this car apparently has off-road and towing capabilities as well.

9.) 2000 Holden Race Car

Unfortunately, it was announced about a year ago that Aussie carmaker Holden is going the way of the dinosaurs in a couple of years. As Holden's a GM property, this car actually started out as a Chevy Monte Carlo, and was designed to be raced in Australia. According to Barrett-Jackson, the car never made it to Australia, but did compete in the Pikes Peak International Hill Climb, winning its class in 2000. 8.) 2012 Perana Z One Couple by Zagato

We know this for a fact: You don't know a single person who owns one of these Corvette-powered bad-boys, which have been marketed as a new TVR. There are actually two of these up for sale, one of them a 600-horsepower variety.

7.) 1985 Mercedes-Benz 500SEC

For those of us with an AMG fetish, this is a collector's item. It's no SL73, but this one was created before AMG was actually owned by Mercedes. 6.) 1991 GMC Syclone Pickup

This little ol' truck has a 0-60 time of 4.3 seconds. Barrett-Jackson cites a Car & Driver report from '91 that says this was faster than any Ferrari or Corvette at the time. That'll still outrun a 2012 BMW M3 by a tenth of a second. This particular Syclone (there are two up for auction) is one of 31 known as the "Saudi" Syclones. According to Wikipedia, "113 (estimated 31 returned) were reported as Export Sales including a subset now referred to as the Saudi Syclones -- a small number were delivered to Saudi Arabia and modified with a metric dash cluster, leaded fuel chip, and a resonator in place of the catalytic converter."

5.) 1981 Pontiac Trans-Am Custom Twin Turbo

Is it ugly? That's debatable. Does it have more than 1,000 horsepower? That's not debatable. Can you imagine the look on some poor supercar owner's face as this flaming chicken flew past him? (Or the look on the new Trans-Am owner's face when he wraps this around a tree.) 4.) 1991 Lola Race Car

Everyone needs a single-seater in their vehicle stable. Take this open-wheeler that was raced back in the CART days by Arie Luyendyk. This car actually was used in Luyendyk's win in the Valvoline 200 at Phoenix International Raceway in 1991.

3.) 2000 Cadillac Northstar LMP Race Car

So what, Cadillac's efforts in the American Le Mans Series and the 24 Hours of Le Mans weren't exactly top-notch. However, it's not like you can buy a Le Mans Prototype at your local used car lot. This is your chance, and with a top speed of 200 mph, you can dominate track day. 2.) Another 2000 Cadillac Northstar LMP Race Car

Yes, there are three of these cars in existence, according to B-J, and you can buy two of them on the same day. You'll need to bring along a friend for competition at your local track day, right?

1.) 1968 Lotus Turbine-Powered Indy Race Car

We'll let Barrett-Jackson do the explaining on this one:

A marvel of automotive engineering, motorsports icon Andy Granatelli and England's Lotus Cars founder Colin Chapman's iconic STP-sponsored #70 Lotus 56-3 Indy Race Car from 1968 housed one of the first turbine engines ever used in an Indy car. Employing the latest aeronautical engineering techniques, Granatelli partnered with Chapman and his team to build four race cars powered by turbine jet engines. Produced at Pratt & Whitney Canada, the ST6N-74 gas turbine engine found in the Lotus 56 race car was developed as a 500bhp powerplant variant model of the PT6 engine for specific use in the 1968 Indianapolis 500. The PT6 family of engines is known for being incredibly reliable. With four-wheel drive, double-wishbone suspensions and the turbine engine, the #70 car was a force to be reckoned with on the track. In other words, the Lotus 56 cars had fantastic control over unbridled power. An innovative design, the turbine engine required around 80% less parts. The Lotus omitted a conventional gearbox because of the turbine's wealth of torque across the entire rev range. As a result, the Lotus 56 cars employed minimalism at its optimal efficiency. It was racing legend Graham Hill--a Classic Team Lotus veteran--who would find himself behind the wheel of the Lotus 56 #70 car in 1968 after winning the Indianapolis 500 in 1966. Hill took to the car immediately, setting a new track record with an average speed of 171.208 mph over four laps in qualifying. Hill pushed the turbine car to fourth place as late as the 110th lap, when a minor crash forced him out of the race. The legend of both the #70 car and the late, great Graham Hill live on. Owned for years by NASCAR legend Richard "The King" Petty, the #70 Lotus 56-3 turbine was purchased by Austin, TX-based car collector and close friend Milton Verret, who ordered a ground-up restoration. With the support of Clive Chapman, son of Colin Chapman, and Vince Granatelli, son of Andy Granatelli, as well as Ellen Bireley, director of the Indianapolis Motor Speedway Hall of Fame Museum and her expert team, the Lotus #70 was completely restored back to its 1968 race-day condition as an absolute masterpiece of automotive engineering. Calling upon the original design plans and archived photographs from decades ago, the #70 Lotus was meticulously restored to the exact period specification. It was honored in 2014 with a nomination for "Car of the Year" at the International Historic Motoring Awards, as well as Octane Magazine Editor's Choice. The one-of-a-kind #70 Lotus has spent the last year on display inside the Indianapolis Motor Speedway Hall of Fame Museum, after Parnelli Jones drove the car during the parade laps of the 2014 Indianapolis 500. Steeped in historical importance, engineering genius and automotive excitement, the rare Lotus #70 is ready to take a new turn in its remarkable journey.

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