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

London's GPS-based speed-limit trial puts Big Brother's foot on the gas pedal

A fleet of 12 Toyota Priuses in London have been fitted with GPS-linked speed limiters to measure how drivers respond to having their speed controlled by a computer rather than their own feet. For now, the trial is local to London, run by Transport for London, the agency that manages the city's roads, buses, subways and trains. The agency is using its own fleet of Priuses for the test and will add a bus and a taxi later this year.

Audi expands use of diesel in U.S. lineup

Audi of America will begin offering 3.0-liter V6 diesel engines in the A8, A7 and A6 cars and the Q5 crossover beginning next year. The four TDI diesel-equipped models will make their debuts next week at the Los Angeles auto show. Audi already offers a diesel powerplant in the Q7 crossover but the 2013 model features an updated engine.

Infiniti to get Audi A3 fighter in product blitz

Nissan plans to introduce a compact, entry-level Infiniti model below the G series to compete against such cars as the Audi A3 and Lexus CT 200h. The car would be part of a global product blitz to build Infiniti's lineup to 10 vehicles from seven by 2017. The car would be based on the Etherea concept shown in March at the Geneva auto show, a person familiar with the plan says.