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

Concept Car of the Week: Chrysler Lamborghini Portofino (1987)

In 1987, Chrysler purchased the bankrupt Italian carmaker Lamborghini to add an exotic brand to its portfolio. In celebration of its acquisition, Chrysler announced it would unveil a futuristic concept car at the Frankfurt motor show bearing a unique logo with the Italian raging bull framed inside Chrysler's famous Pentastar. It was during an internal aerodynamic study that designer Kevin Verduyn drew the lines of a four-seater sedan concept called the Navajo.

For new CAFE rules, automakers place high-stakes tech bets

Game-changing 2015 fuel economy rules are forcing vehicle development teams to make high-stakes bets on expensive technologies--bets that will separate the winners from the also-rans. Not only do federal rules target a 2015 fleet average of 35.5 mpg, up from the current 27.5 mpg for cars and 23.1 mpg for light trucks; they force automakers to bet on different technology packages for each vehicle segment. Companies that do best at mixing technologies while keeping down costs will have an advantage when buyers wince at higher stickers.

Detroit 3 set pace as March sales advance

UPDATED-U.S. light-vehicle sales -- led by strong pickup and crossover demand at Detroit's automakers -- rose 3 percent to 1.45 million units last month, slightly below forecasts but a positive signal the spring selling season is off to a solid start. It was the industry's best month since 1.48 million light vehicles were sold in August 2007.