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Jay Leno hits the road in a 1951 Jaguar XK 120 Hot Rod

The 1951 Jaguar XK120 featured in this episode of Jay Leno's Garage might look vaguely like a classic Jag roadster at first, but underneath this cat is something completely different. It was built by Leno's buddy Jason Len of XK's Unlimited when he grew tired of keeping these convertibles stock, and this aluminum-bodied beast was the result. Practically the only major Jaguar part left is the engine. It's a tuned 3.8-liter inline six from an E-Type with Weber carbs that makes an estimated 300 horsepower out of some gorgeous side-exit exhausts. The mill is backed up to a BorgWarner five-speed manual. However, the big surprise is the chassis. In place of Jag's original solution, Len has a custom tubular space frame that he claims sheds some 1,000 pounds over the stock example. There are still some classic Jaguar touches left, though, such as the fin over the driver's head that is reminiscent of the D-Type, and both the wheels and gauges are replicas based on that classic racer. Of course the best part is watching Jay drive this Jag hot rod. This big cat really knows how to purr.

The best cars we drove this year

Six hundred and fifty. That's roughly how many cars pass through the hands of Autoblog editors every year, from the vehicles we test here at home, to the cars we drive on new product launches, testing roundups, long-term cars, and so on. Of course, our individual numbers vary due to several reasons, but at the end of the day, our team's repertoire of automotive experience is indeed vast. But let's be honest, some cars certainly stand out more than others. So as the year's about to turn, and as we're readying brand-new daily cat calendars for our cubicles, our editors are all taking time to reflect on the machinery that made this year so special, with one simple, open-ended question as the guide – a question that we're asked quite frequently, from friends, family, colleagues, and more. "What's the best car you drove this year?" Lamborghini Huracan When I review the list of everything I drove in 2014, picking an absolute favorite becomes almost impossible. I mean, how does one delineate between the joy offered by cars as different as the Alfa Romeo 4C, Volkswagen Golf R, Mercedes-AMG GT S and even the humble-yet-wonderful Chevy Colorado? Okay fine, I'll just pick the Lamborghini. I drove the Lamborghini Huracan LP 610-4 on a racetrack, in the mountains, and along southern coast of Spain. It felt like the king of the car jungle in all of those places, sucking the eyeballs of observers nearly out of their heads as it drove by, and almost melting my brain with its cocktail of speed and grip and intense communication. It feels a little easy to say that the one new supercar I drove this year was also my favorite, but the fact is that the Huracan is one of the finest cars I've driven during my career, let alone 2014. Judge me if you must. – Seyth Miersma Senior Editor Rolls-Royce Wraith There are a couple of ways to look at the question, "What's the best car you drove this year?" In terms of what was so good I'd go out and buy one tomorrow, that'd be my all-time sweetheart, the Volkswagen GTI. Or if I'm just talking about sheer cool-factor, maybe something like the Galpin GTR1, BMW i8, or Mercedes-Benz G63 AMG. But instead, I'm going to write about the sheer opulence of being the best of the best. The hand-crafted, holier-than-thou, shut-your-mouth-when-I'm-talking-to-you supremacy. I'm picking the Rolls-Royce Wraith. I drove the Wraith for a week in April, and was really, really impressed. This car does everything, perfectly.

Jaguar J-Pace crossover spied with diesel hybrid power

The new Jaguar F-Pace is only now hitting dealerships, but the British automaker is already testing a bigger, higher-end example. Allegedly named J-Pace – tying it to the flagship XJ sedan the same way the F-Pace is to the XF (so expect an E-Pace before too long) – Jaguar's engineers stretched the wheelbase and cobbled together a big CUV from an F-Pace's body parts. The biggest giveaway is on the rear door's cutline. A normal F-Pace's shut line runs right into the middle of the rear wheel arch. But on this mule, the door closes well forward of the arch. Outside the axles, Jag has stretched the front overhang – it's far more prominent with a completely different lower intake – and the super-short rear overhang reinforces the idea that we're seeing a longer platform. While we know the wheelbase is longer than the normal F-Pace, the platform underpinning this mule could go one of three ways. First, in what would probably be the most cost-effective route, Jaguar could simply stretch the chassis underpinning the F-Pace. Second, Jag could mine the Land Rover parts bin for a fullsize platform, perhaps from the Range Rover. It's not a crazy idea, and would open the J-Pace to a more potent line of powertrains – hello 5.0-liter, supercharged V8. Finally, the J-Pace could borrow its platform from the XJ sedan. One reason this mule could be riding on a Land Rover platform is because of its powertrain. According to the vehicle lookup on the British Ministry of Transport's website – see the final slide in our gallery above – the mule's number plates belong to a vehicle with a 2.0-liter turbodiesel engine and an electric motor, a diesel hybrid. The fullsize Range Rover is available in such a configuration outside the US, but it uses a 3.0-liter V6. Clearly, the J-Pace is still very early in its development process. That means we shouldn't count on seeing a production-ready vehicle for quite some time. Our spies point to a 2019 debut as a 2020 model. We'll just have to wait and see. Related Video: Featured Gallery Jaguar J-Pace: Spy Shots View 12 Photos Image Credit: KGP Photography Green Spy Photos Jaguar Crossover Hybrid Luxury