1964 356c Porsche Karmann Coupe on 2040-cars

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Is the skill of rev matching being lost to computers?

If the ability to drive a vehicle equipped with a manual gearbox is becoming a lost art, then the skill of being able to match revs on downshifts is the stuff they would teach at the automotive equivalent of the Shaolin Temple. The usefulness of rev matching in street driving is limited most of the time – aside from sounding cool and impressing your friends. But out on a race track or the occasional fast, windy road, its benefits are abundantly clear. While in motion, the engine speed and wheel speed of a vehicle with a manual transmission are kept in sync when the clutch is engaged (i.e. when the clutch pedal is not being pressed down). However, when changing gear, that mechanical link is severed briefly, and the synchronization between the motor and wheels is broken. When upshifting during acceleration, this isn't much of an issue, as there's typically not a huge disparity between engine speed and wheel speed as a car accelerates. Rev-matching downshifts is the stuff they would teach at the automotive equivalent of the Shaolin Temple. But when slowing down and downshifting – as you might do when approaching a corner at a high rate of speed – that gap of time caused by the disengagement of the clutch from the engine causes the revs to drop. Without bringing up the revs somehow to help the engine speed match the wheel speed in the gear you're about to use, you'll typically get a sudden jolt when re-engaging the clutch as physics brings everything back into sync. That jolt can be a big problem when you're moving along swiftly, causing instability or even a loss of traction, particularly in rear-wheel-drive cars. So the point of rev matching is to blip the throttle simultaneously as you downshift gears in order to bring the engine speed to a closer match with the wheel speed before you re-engage the clutch in that lower gear, in turn providing a much smoother downshift. When braking is thrown in, you get heel-toe downshifting, which involves some dexterity to use all three pedals at the same time with just two feet – clutch in, slow the car while revving, clutch out. However, even if you're aware of heel-toe technique and the basic elements of how to perform a rev match, perfecting it to the point of making it useful can be difficult.

Russian President Putin's new limo makes debut ahead of 2017 production

What's the best way to ignore an international money-laundering scandal that's allegedly revealed your link to $2 billion in off-shore accounts? Why yes, you get a new car. While information from the so-called Panama Papers is still being uncovered, Russian President Vladimir Putin's new Russian-made ride has been unveiled. Unlike US President Barack Obama's Cadillac-badged Beast, Putin's Kortezh will be available to any Russian that has the means. A total of 5,000 will be built in four different styles – limo, sedan, SUV, and minivan – although only 200 will roll off production lines next year, Sputnik News reports. Deliveries are expected to start in late 2017, while assembly will carry on through 2020, the Moscow Times reports. Commerce and Industry Minister Denis Mantrurov confirmed that Porsche has been brought in to help develop the Kortezh's powertrain. Whether that engine ends up being the turbocharged V12 we reported on way back in October 2014 isn't clear, though. Regardless of what's sitting under that long hood, we're betting it's going to be extremely powerful. Putin will likely take delivery of the Kortezh in 2017. Related Video:

McLaren P1 squares off against Porsche 918 in Evo track battle

Evo's side-by-side comparison of the McLaren P1 against the Porsche 918 Spyder isn't the first time we've seen England and Germany's ultimate automotive weapons sized up together; last month, Autocar tested them over the standing mile, with a Ducati 1199 Superleggera playing the joker. Evo throws a few curves at its test, though, taking the supercars to Anglesey Circuit in Wales to see which will lay down the fastest lap time with scribe Jethro Bovington at the wheel. In case the numbers haven't yet been seared into your memory, while both are assisted by electric motors, the 3,069-pound, rear-wheel drive P1 gets on with 903 horsepower and 664 pound-feet from a 3.8-liter, twin-turbocharged V8. The 3,750-pound, all-wheel-drive 918 Spyder does its job with 795 hp and 575 lb-ft surging out of a naturally aspirated, 4.6-liter V8. We're not told know which circuit layout he uses for the test, but both cars comfortably eclipse the mark set by the fastest coupe Evo's driven around it so far, the Ferrari 458 Speciale. Then, in an epilogue occasioned by a tire change, one of the supercars comfortably eclipses its own time again, before Bovington declares one the master of the track and the other the ruler of the street. Enjoy finding out which is which in the video above.