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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).

Mercedes AMG GT3 racecar due in 2016

Our life with the Mercedes-AMG GT has only just begun, and a full life it looks like it will be. The latest in preposterous two-doors from AMG is launching in GT and GT S flavors, but a few more branches of the family tree are already planned: a racing entry for the FIA GT3 championship is scheduled to appear in 2016, giving the current SLS AMG GT3 another year to gobble up victories before it takes a drive across the Styx. More exciting for those who only suit up on Sunday for church, whispers are that a we'll also get a streetable version of the race car - not called "GT3" because that alphanumeric is owned by Porsche, but definitely aimed at its Stuttgart rival. AMG boss Tobias Moers told Autocar the objective for that car is "more power, less weight, better aerodynamics and different suspension but the targets should be the power to weight ratio, drivability, lap time and tremendous feel." Those targets will be aided by a carbon fiber weight-loss regime of up to 220 pounds and more power - perhaps 550 horsepower - from the currently "very understressed" engine. Supposing that still isn't enough for you, then the Black Series version should curl your toes, if you can wait until 2018 for it.

Performance cars old and new are headed to auction at Las Vegas Grand Prix

Auction house RM Sotheby's is hosting a sale ahead of the 2023 Las Vegas Formula One Grand Prix, and most of the lots that will cross the block were designed with performance in mind. Whether you want a supercar or a Formula One car, there's a chance you'll find it in Sin City. One of the highlights from the sale in terms of rarity and price is the Mercedes-AMG Petronas W04 that Lewis Hamilton drove in the 2013 F1 season. Assigned chassis number F1W04-04, it's the team's last car powered by a naturally-aspirated V8 engine, and you're on the wrong track if you're thinking of the 4.0-liter unit that powers AMG's road cars. The engine in question is a 2.4-liter unit that develops 750 horsepower and is capable of revving to a screaming 18,000 rpm. The KERS system injects 80 additional horses into the driveline. Hamilton drove F1W04-04 in 14 of the 2013 season's 19 races, and he won that year's Hungarian Grand Prix in the car. RM Sotheby's notes that F1W04-04 is "the sole example to be sold outside of the Mercedes-Benz organization," which explains why it expects the car will sell for anywhere between $10 million and $15 million excluding the buyer's fee and a 2.5% import duty that applies to American residents. That's a lot of money, but modern Formula One cars rarely come up for sale. Several other cars are expected to sell above the $1 million mark, including a 1999 Mercedes-Benz CLK GTR ($8 million to $9 million), a 1988 Porsche 959 Komfort ($1,650,000 to $1,850,000), and a 1996 Bugatti EB110 Super Sport ($2,500,000 to $3,250,000). The 1990 Ferrari F40 GT (one of 21 units built) could bring up to $4 million. You can take home a rare, high-end classic even if you cap your budget at $1 million. How about a 1984 Lamborghini Countach 5000 S that was delivered new to Ralph Lauren and that has been in the hands of its second owner since 1986? RM expects the coupe will sell for up to $900,000. The auction house is also giving enthusiasts two distinctly different ways to spend a six-digit sum on a 30-something-year-old Mercedes-Benz. There's a 1990 190E 2.5-16 Evolution with about 3,400 original miles that could fetch up to $700,000. That's a lot to pay for a W201, but this isn't a run-of-the-mill Baby Benz: It's one of 502 examples built for homologation purposes. Alternatively, the 1989 560SEC AMG 6.0 Wide-Body could sell for up to $900,000. It's one of the most emblematic cars designed by AMG before it joined Mercedes-Benz.