Thor Mx Motocross Women's 2017 Roost Off-the-shoulder Sweatshirt (blue) Medium on 2040-parts.com

Cash for clunkers: Is it ready for prime time in America?

One proposed solution to prop up new-car sales in the United States involves paying bonuses to owners of older vehicles who send their cars to the scrapyard and buy new ones. Proponents say that not only does the auto industry benefit, but so does the environment, as emissions decrease and fuel economy typically improves in newer models. Critics, however, say that scrapping older vehicles hurts collectors by reducing the number of older models available and also hurts those least able to afford to buy newer vehicles by driving up the price of used cars.

BMW Concept 4-series Coupe (2012) first photos

BMW is overhauling the 3-series Coupe - it'll be replaced in 2013 by the new 4-series Coupe and Convertible, previewed in this remarkably production-ready concept car. Munich reserves the 'Concept' moniker for its show cars which are in reality showroom ready. So strip away the sexed-up exhausts, 20in wheels and other trinkets and what you're looking at here is the new 2013 BMW 4-series.

Reviving the rotary: Two roads to redemption for Mazda's Wankel engine

Mazda is killing production of its famed rotary engine when the last RX-8 sports car rolls out of the plant next summer. But the company eyes two roads to resurrection. The first is using an improved engine as the main power plant.