2018 Jaguar F-pace S on 2040-cars

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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.

Top horsepower-per-dollar cars in 2017

Bang for the buck. That quasi-scientific statistic is bandied about by motor heads everywhere from classrooms to barrooms, though the truth of the matter is that it's exceedingly complex to measure. A fair performance-per-dollar index would include something like cross-referencing MSRP (Manufacturers Suggested Retail Price) with point-to-point times on a track or driving route, which is obviously hard to do comprehensively. But, for the sheer joy of talking about cars and playing with a big spreadsheet, there's always the horsepower-per-dollar index, which is more straightforward, albeit hilariously flawed. There are vagaries even with this simple formula, of course: MSRP for vehicles can change at a moment's notice, to say nothing of the bottom-line shifting that happens with local deals or showroom negotiation. For this list we're running with the straight MSRP wherever possible, and as recently reported as we can get it. All the vehicles on this list are 2017 models, and all trims are reported where the lowest price and differing power levels intersect. Some choices were made for personal preference and some for sanity, avoiding things like all 48 trim levels of the Ford Transit, all with the same horsepower). If this list were a simple top ten, or even a top fifty, you'd be bored to tears with all the red, white and blue that is represented. Following perfectly with conventional wisdom, American cars really do lead the world where hp/$ is concerned. So, for the sake of variety (and the sheer joy of seeing a minivan 'win' one round of this thing) I've sorted out some top five and bottom five lists for broad power categories. Let's dive in. Less Than 100 Horsepower Okay, okay, this is hardly a category we'll grant you. But we've often tried to click off all the sub-100-hp cars on sale in the US, and making this list gave us an excuse. It also illustrates that none of these smallish vehicles bring cheap horsepower to the table - for that you'll need a motorcycle. The segment-leading Chevy Spark (above) asks just over $139 for each hp, and that Smart Fortwo Electric Drive has hp on sale for about the same price as its very distant family cousin, the Mercedes-Benz SL65 AMG (insert your favorite Smart joke here... we know you want to).

Ian Callum wanted to call Jaguar's crossover X-Type [w/poll]

Jaguar raised some eyebrows when it announced that it would call its upcoming crossover F-Pace. But the British automaker didn't just pick the name out of a hat. Speaking with Auto Express, Jaguar's design director Ian Callum said the company entertained several possible nameplates for its first crossover, and that he personally advocated for resurrecting the name X-Type. The nameplate was, of course, previously used on the marque's entry-level sedan – the predecessor to the upcoming XE that was based on the front-drive platform of the Ford Mondeo and which was also offered with all-wheel drive. The connection with that much-maligned model is reportedly ultimately what dissuaded the company's marketing gurus from using the nameplate again, even if it might have been more suitable. Another nameplate Coventry reportedly considered was XQ, but the latter letter's use by rival Audi for its crossovers and by former sister company Aston Martin for its personalization range ruled the prospect out for the Leaping Cat marque. Auto Express notes a connection between the name F-Pace and Jaguar's 1960s ad campaign hailing its products as offering a combination of "Grace, Space and Pace." For his part, Callum didn't dismiss the possibility the slogan could could lead to additional models wearing similar nameplates like F-Grace or F-Space. What do you think – did Jaguar pick the right name for its first foray into the crossover market? Share your thoughts in Comments and cast your vote in our poll below.