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The latest Rolls-Royce concept is a hybrid dump truck

Is a standard Rolls-Royce not big and imposing enough for you? Perhaps the company's latest concept can get you to pass the Grey Poupon. Behold, the Rolls-Royce MTU hybrid haul truck. The Cullinan might come with 22-inch rims, but when equipped with its R63 Michelin XDRs, each wheel and tire combo of the ultimate Roller will stand over 13 feet tall. With a driver's seat a full story off the ground, it's so lofty you won't even see the plebes that you crush in their feeble Coachbuild Dawns as indifferently as Loxodonta africana steamrolls a line of ants. Serve as your own life-size Spirit of Ecstasy as you look down at the puny Parthenon radiators of run-of-the-mill Phantoms from atop your soaring grille, located a full flight of stairs above the lowly earth. All jokes aside, the Rolls-Royce truck mainly serves to promote its new MTU V12 2000-series industrial 12-cylinder engines. Rolls-Royce doesn't even produce the haul trucks; typically, they provide the engines for installation into rigid dumpers built by Liebherr, Hitachi, or Selex. The new hybrid mill produces 1,560 horsepower, meant to replace the V16 4000-series 16-cylinder engines making 2,500 horsepower. However, Rolls-Royce says performance will be the same while dropping carbon dioxide emissions by 30 percent in new installations, or 22 percent with retrofits. Like a Prius, the engine uses a battery pack to store regenerative energy captured as the trucks descend into quarries, then expends that juice to climb back up. It also requires no additional space for an exhaust gas treatment system or diesel urea additives, which are apparently concerns in a mining truck. In addition, Rolls-Royce is in the process of engineering its industrial engines to run on sustainable fuels such as hydrogen brewed from renewable energy (not the way we do it in the U.S.). The company hopes to have hydrogen fuel engines ready by 2023 in stationary applications. It's all part of the company's goals for a — say it with us — carbon-neutral future. The concept truck was conceived for MINExpo 2021, a mining convention taking place September 26-29 in Las Vegas. Hopefully they'll put it into production and offer a constellation headliner in the cab.

Check out King Charles III's $17.6 million car collection

King Charles III's coronation will take place in England on May 6, and being crowned a monarch comes with a long list of perks with four wheels. He will gain full access to the Royal Family's fleet of cars, which is valued at about GBP14 million (approximately $17.6 million). The two most expensive cars in the collection are nearly identical: they're a pair of Bentley State Limousine models (pictured) built for Queen Elizabeth II, King Charles III's mother, in 2002. Only two units were made, and they're both part of the Royal Family's fleet, so they're difficult to put a value on; it's not like one is going to end up listed on your favorite auction site anytime soon. British company Nationwide Vehicle Contracts, which compiled the list, estimates that each armored, 245-inch long sedan is worth at least GBP10,000,000 (roughly $12.6 million). Dropping below the eight-digit threshold, the second-most-valuable car in the Royal Family's fleet isn't really a car. It's the Gold State Coach, which Matchbox recently released a 1/64-scale replica of, and its value is estimated at GBP1.6 million (about $2 million). At 275 inches long it's even bigger than the Bentley limousine and it weighs about 9,000 pounds. It's 261 years old and designed to be pulled by eight horses, and has been part of every coronation since 1831. The rest of the Royal Family's vehicles are relatively mundane. There's a 1965 Aston Martin DB6 Volante that Queen Elizabeth II and her husband, Prince Phillip, bought for King Charles III on his 21st birthday. It's worth GBP1 million (about $1.2 million). The collection also includes a Rolls-Royce Phantom VI (about $627,000), a Bentley Bentayga (about $201,000), a Land Rover Range Rover long-wheelbase Landaulet ($133,000), a Jaguar XE (about $41,000), and a Land Rover Defender ($38,000). "Luxury cars have long been associated with the monarch and King Charles III, in particular, is known for his fondness of motor vehicles. His impressive collection features sentimental value with motors passed down from his late mother, Queen Elizabeth II, to cars bought for him by his parents," explained Keith Hawes, the director of Nationwide Vehicle Contracts, in an interview with CBS News. Being at the head of a car-making nation's royal family also comes with drawbacks: Every vehicle in King Charles III's fleet is British.

Time to catch up with Jay Leno's Garage, including his Lamborghini Espada restoration

If you're already jealous of the time, effort and money that Jay Leno can devote to his massive car collection, prepare to get a little greener with envy with this latest video from Jay Leno's Garage. Instead of the usual format of discussing a model for about ten minutes and then taking it out for a test drive, this week Leno gives viewers on a tour of over a dozen projects concurrently happening in his stable. The breadth of the vehicles shown and the things being done to them run the entire span of the automotive hobby. At the same time, Jay's shop is working on just a simple restoration of his 1969 Lamborghini Espada (pictured), and at the other side of the building, the team is rebuilding a wood-bodied 1914 Detroit Electric from scratch. He eventually plans to slot a more modern electric drivetrain into it. If bikes are more your interest, there's a freshly completed Brough Superior just waiting for a ride, and if American models are your thing, a Ford Bronco is getting a Coyote V8 installed into it. You have some very specific tastes if you can't watch this clip and start wishing at least one of these vehicles could be in your own garage. Other than the personal projects his mechanics are working on in the shop, Jay gets to have them all, plus plenty more.