The 3.2 liter V6 will be used with a stop-start system — not a large surprise, but the number of 3.2s being produced for testing might be. This photo comes from within Chrysler, and shows a number of the engines, with purple paint presumably to make sure the parts don’t get mixed up with the 3.6 variety. The 3.2 is reputed to have numerous internal modifications which will allow substantial gains in gas mileage.
Chrysler is set to use Fiat’s stop/start technology on the 2013 Ram, as an option; the feature shuts off the engine while at a stop, under certain conditions, instantly restarting it when the gas pedal is pressed. The system is transparent and has been used on hybrids for many years, as well as traditional petro-fueled cars in markets where fuel prices are high.
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