1995 Jaguar Xjs Convertible 2-door 4.0l on 2040-cars

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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).

Jaguar XE SVR to challenge M3, C63 with supercharged V8 power

Jaguar has a healthy powertrain range lined up for its new XE, including an array of four-cylinder engines and a supercharged 3.0-liter six that will, for now, serve as the range-topping offering in the XE S. But Car and Driver claims to have it on good authority that an even more powerful eight-cylinder version is in the works, as well. According to C/D, the XE's engine bay has been designed to accommodate the company's ubiquitous 5.0-liter V8 engine, which in the larger XF is offered in several states of tune, including the XF Supercharged with 470 horsepower, the XFR with 510 hp and the flagship XFR-S with 550 hp. Just which version (or versions) would be offered in the XE remains to be seen, but even in its lowest-spec supercharged form, the 470-hp version would already be enough to challenge the 425-hp BMW M3 and the base 469-hp version of the new Mercedes-AMG C63. If Jaguar wants to take on the C63 S, however, it will need to shoehorn in one of the more powerful versions. In the end, Coventry's new Special Vehicle Operations division may opt to offer two versions, like it does with the XFR and XFR-S. Expect the top version, however much muscle it packs, to wear the British automaker's new SVR badge. It just may take a few years before it does so.

40+ cars that barely avoid the gas guzzler tax

The Gas Guzzler schedule, with mpg ratings and charges that haven't changed since 1991, lays out which fuel-swillers owe what to Uncle Sam.
I started thinking about the "Gas Guzzler Tax" - considerably less well known as The Energy Tax Act of 1978 - when I was driving Dodge's new Challenger SRT Hellcat last week. Unsurprisingly for a car that can burn 1.5 gallons of gas per minute at max tilt, theoretically able to empty a full tank of premium in about 13 minutes, the Hellcat will be subject to the Gas Guzzler Tax schedule when it goes on sale.