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BMW M4 vs. Lexus RC F in Head 2 Head sports coupe showdown

It's the showdown everyone's been looking forward to, the East versus West grudge match of the year. We're talking, of course, about the BMW M4 versus the Lexus RC F.
Although BMW uses a twin-turbo straight-six and the Lexus uses a free-breathing V8, the two are pretty closely matched on paper: a luxury coupe with over 400 horsepower channeled to the rear wheels.
The BMW has been doing these cars for longer, and the M4 boasts a higher power-to-weight ratio. But then the RC F has more power - and without forced induction to break up the rev range. So which is the better luxury muscle coupe? Watch the latest episode of Motor Trend Head 2 Head to find out.

TMG still developing Lexus LS Sports 650 [w/video]

If you're going to make a super sedan, you'd better do it in Germany. That's where Audi, BMW and Mercedes-Benz do it, along with third parties like Alpina, Brabus and G-Power, among others. Deutschland is the epicenter of the movement, regularly churning out the most powerful four-door rockets in the world. It's also where one of the racing divisions for Toyota has been hard at work on the TMG Sports 650.
Toyota Motorsport GmbH started with a Lexus LS and turned it into a 641-horsepower, twin-turbocharged super sedan it revealed late last year at the Essen Motor Show. But though we haven't heard much about it since then, the team behind Toyota's F1 and Le Mans efforts are apparently still hard at work on the project.
Speaking with Lexus' own UK blog, TMG chief Alastair Moffitt revealed that the project started way back in 2010, shortly after Toyota shut down its F1 program and left the racing team with nothing to do. The 5.0-liter twin-turbo V8 was initially producing as much as 800 horsepower, but has since been refined to 650 so that it could theoretically be put into production and onto the road.

10 automakers sued over keyless ignitions

Keyless ignition has rapidly proliferated throughout the auto industry to become a fairly normal feature on new cars. It's supposed to offer the convenience of keeping the fob in your pocket and just pressing a button to drive away. However, ten major automakers are now being sued in US District Court over claims that the system is dangerous, Reuters reports. The suit alleges that people are forgetting to shut off the engine, and the lack of an idle timer is the cause for 13 deaths by carbon monoxide poisoning and multiple injuries. The suit currently includes 28 plaintiffs, according to Reuters, but the lawyers are asking for class-action status to potentially add many more. The case goes after a major swath of the industry, including BMW, Daimler, FCA, Ford, General Motors, Honda, Hyundai, Nissan, Toyota, and Volkswagen, plus their related brands like Acura, Infiniti, Mini, and Lexus. In all, over five million vehicles are affected. The assertion here is that people walk away from their vehicle without shutting it off because they believe the engine shuts off automatically. If parked in a garage, carbon monoxide can build up, leading to poisoning. The lawyers claim automakers know this is a problem and also cite 27 complaints to the National Highway Traffic Safety Administration about the issue, according to Reuters. The plaintiffs are asking for an automatic shut-off and damages from the companies. These concerns have come up before, though. Toyota previously faced a lawsuit over a carbon monoxide death after a woman accidentally left her Lexus running. Also earlier this year, GM recalled 64,186 examples of the 2011-2013 Chevrolet Volt because owners weren't shutting them off. The problem resulted in two injuries, and the company released a software update to limit the idling time.