Arias Pistons 12.5:1 Compression 82mm Bore Honda B-series on 2040-parts.com

Renault Eolab Concept

Renault has bucked the trend of rather uninspiring Paris Motor Show previews with the Eolab. This B-segment-sized car that has been designed to a brief that states it must return fuel economy of 2l/100km (118mpg US/141mpg UK), and that all of its major technical innovations must be production-feasible by the year 2020. The Eolab is actually two cars – the Eolab prototype, which the engineering team has signed off as capable of 1l/100km (235mpg US/282mpg UK), and the Eolab Concept, which was overseen by the design team.

2009’s 10 most fuel-efficient cars in America: The AutoWeek list

Toyota Prius Hybrid 46 mpg combined Base price: $22,720 Our take: The perennial mpg all-star takes the crown again for 2009. Honda Civic Hybrid 42 mpg combined Base price: $24,320 Our take: Another top contender in reliability and fuel economy, the Honda Civic Hybrid is a smart choice. Smart Fortwo Coupe 36 mpg combined Base price: $12,635 Our take: This funky coupe is the least expensive on our list, proving you can be green without spending it.

Multi-touch UI reduces touchscreen interaction to simple swipes [w/video]

Touchscreens have become widespread standard features in many cars over the last few years, consolidating the modern car's many functions into one interface. But despite their advantages there's the big downside of driver distraction, something user interface designer Matthaeus Krenn believes he has solved with his UI. Unlike most other touchscreens, Krenn's interface isn't organized into menus and small, hard-to-hit buttons, but instead makes use of multi-touch gestures, reducing the accuracy and attention needed to operate key functions.