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The greenest cars of 2024: Vehicles that use the least fuel and cost less to operate

All-electric vehicles may make headlines for environmental friendliness and fuel efficiency, but the “greenest” car in America in 2024 has a gasoline engine. According to the American Council for an Energy-Efficient Economy's annual GreenerCars ratings of the most environmentally friendly cars, the latest Toyota Prius Prime SE plug-in hybrid tops the list of greenest cars, although it's something of an anomaly, because battery-electric EVs follow it in spots two to five. Of the top 10 vehicles in the ratings, six are electric and four are hybrids: Rank Make & Model Powertrain Green Score MSRP Estimated Annual Fuel Cost* 1 Toyota Prius Prime SE PHEV 71 $32,975 $529 2 Lexus RZ 300e EV 67 $55,150 $651 3 Mini Cooper SE EV 67 $30,900 $747 4 Nissan Leaf EV 66 $28,140 $741 5 Toyota bZ4X EV 66 $43,070 $689 6 Toyota RAV4 Prime PHEV 64 $43,690 $741 7 Hyundai Elantra Blue Gas Hybrid 64 $26,250 $864 8 Hyundai Kona Electric EV 63 $34,050 $695 9 Toyota Camry LE Gas Hybrid 63 $28,855 $907 10 Kia EV6 EV 63 $43,975 $689 11 Toyota Corolla Gas Hybrid 62 $23,500 $944 12 Hyundai Ioniq 5 EV 62 $41,650 $737 *ACEEE analysis using EIA data of annual cost—from gasoline, electricity, or a combination—of driving 15,000 miles The ACEEE also compiled two other vehicle rankings: the so-called “Greener Choices” and the “Meanest List.” The Greener Choices list includes a variety of high-scoring conventional vehicles, and the Meanest List identifies the worst-performing mass-market models. Finishing first in the “greener” list — which the organization says is about cars “available nationwide with among the lowest environmental impacts” — is the Honda Accord Hybrid. As far as the “worst-performing mass market” vehicle, that dubious distinction goes to the $184,000 Mercedes-Benz AMG G63. “ItÂ’s important for automakers to keep expanding affordable EV options rapidly so that the benefits of EVs are available to drivers across a wider spectrum of incomes as we transition away from cars that burn gasoline,” said Peter Huether, ACEEEÂ’s senior transportation research associate and lead researcher for the GreenerCars rankings. “For drivers whose needs are not met by todayÂ’s charging infrastructure, many efficient and affordable hybrid options are available.” Just over half the cars on the 2024 Greenest List start at under $35,000, including four EVs and three gas hybrids.

Brabus-tuned Mercedes G500 4x4 is an over-powered off-roader

Even from the factory, the Mercedes-Benz G500 4x42 is an off-road bruiser that's good for 415 horsepower and 450 pound-feet of torque. Apparently, those already meaty figures just aren't enough for the power-hungry folks at Brabus. The company's new tuning kit for the twin-turbo 4.0-liter V8 pushes things up to 493 hp and a prodigious 523 lb-ft of twist. On top of the grunt, buyers can order a heap of extras to make the SUV look a whole lot meaner. They're all going on display at the 2015 Frankfurt Motor Show. The heart of Brabus' power upgrade is its custom control module to tweak the engine management, and the result is adjusted boost pressure and the mapping for the fuel injection and ignition. There's also a stainless steel exhaust with butterflies that vary between "Sport" and an appropriately named "Coming Home" mode at the press of a button. The chrome tailpipes add an extra visual pop, too. The G500 4x42 rides on off-road tires, and even after Brabus' big boost, it's not lightning quick. The run to 62 miles per hour now takes 6.9 seconds, and the rubber also mandates a top speed limited to 130 mph. For buyers really looking to show off, Brabus has a wild body kit for the G500, too. It includes new lower bumpers and polished underbody guards. Meanwhile, the hood grows a scoop, and the headlight update adds black-tinted Xenon lights with LED turn signals to replace the units usually on the fenders. Inside, a mix of quilted leather, Alcantara and bright red stitches finishes off the brash tweaks. World premiere at the IAA 2015 BRABUS refines the Mercedes G 500 4x42 368 kW / 500 HP, 710 Nm of torque and exclusive BRABUS luxury appointments for the extreme off-roader Mercedes G 500 4x42: the new special model of the G-Class is designed for maximum off-road capabilities and offers the perfect basis for exclusive refinement a la BRABUS (Brabus-Allee, D-46240 Bottrop, phone +49 / (0) 2041 / 777-0, fax +49 / (0) 2041 / 777 111, Internet www.brabus.com). This includes an increase in the power output of the twin-turbo V8 to 368 kW / 500 HP (493 bhp) and a boost in its peak torque to 710 Nm (523 lb-ft). As a result, the tuned off-roader sprints from rest to 100 km/h (62 mph) in just 6.9 seconds. Due to the all-out off-road tires, the top speed is limited electronically to 210 km/h (130 mph). The spectacular appearance of the all-wheel-drive car is bolstered further by a high-end BRABUS paint finish and targeted BRABUS bodywork modifications.

Mercedes-Benz engines with 48-volt systems coming in 2017

As part of a big green push announced yesterday, Mercedes-Benz is jumping into the world of 48-volt power. The company will launch a new family of efficient gasoline engines next year and will begin rolling out 48-volt systems with it, likely in its more expensive cars first. Mercedes will use the 48-volt systems to power mild-hybrid functions like energy recuperation (commonly called brake regeneration), engine stop-start, electric boost, and even moving a car from a stop on electric power alone. These features will be enabled through either an integrated starter-generator (Mercedes abbreviates it ISG) or a belt-driven generator (RSG). (RSG is from the German word for belt-driven generator, Riemenstartergeneratoren. That's your language lesson for the day.) Mercedes didn't offer many other details on the new family of engines. There are 48-volt systems already in production; Audi's three-compressor SQ7 engine uses an electric supercharger run by a 48-volt system, and there's a new SQ5 diesel on the horizon that will use a similar setup with the medium-voltage system. Electric superchargers require a lot of juice, which can be fed by either a supercapacitor or batteries in a 48-volt system. Why 48-volt Matters: Current hybrid and battery-electric vehicles make use of very high voltages in their batteries, motors, and the wiring that connects them, usually around 200 to 600 volts. The high voltage gives them enough power to move a big vehicle, but it also creates safety issues. The way to mitigate those safety issues is with added equipment, and that increases both cost and weight. You can see where this is going. By switching to a 48-volt system, the high-voltage issues go away and the electrical architecture benefits from four times the voltage of a normal vehicle system and uses the same current, providing four times the power. The electrical architecture will cost more than a 12-volt system but less than the complex and more dangerous systems in current electrified vehicles. The added cost makes sense now because automakers are running out of ways to wisely spend money for efficiency gains. Cars can retain a cheaper 12-volt battery for lower-power accessories and run the high-draw systems on the 48-volt circuit. The industry is moving toward 48-volt power, with the SAE working on a standard for the systems and Delphi claiming a 10-percent increase in fuel economy for cars that make the switch.