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The Chrysler 1.8 Liter Engine of the 1990s and the Fiat e.torQ

This is a 16 valve, four-cylinder SOHC gasoline engine, based on the Neon 2.0 but smaller to get around the tax hurdle often placed on 2.0 liter and larger engines in Europe. It was developed with a number of corporate partners, to spread research costs and apply more expertise.

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The 1.8 (1796 cc) had lower noise, vibration, and harshness than the 2.0, according to Chrysler, along with better fuel economy; the European version, made in Trenton, Michigan, conformed to Euro Stage III emissions rules. Power was rated at 86 kw (115 bhp) at 5750 rpm and 152 N-m (112 lb-ft) at 4900 rpm, far below the 2.0's 132 hp and 129 lb-ft.

Fuel mileage in the Neon was 11.1l/100km (21 mpg) urban, 6.7l/100km (35 mpg) extra-urban, and 8.3 l/100km (28 mpg) combined. By comparison, the EPA rated the 2.0 Neon at 29 city, 38 highway with the manual transmission; the ACR transmission used in Europe to maintain acceleration despite lower power hurt fuel economy.

Like all new Chrysler engines, the design process was "paperless" and used extensive computer modeling and rapid modeling techniques.

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Fiat later purchased the Brazilian factory which made the engines, to replace GM-based four-cylinders; a modernized version, now dubbed e.torQ, was launched in 2011. As of 2014, it was still made there, in two versions, a 1.6 and 1.8 liter (most likely the 1.6 is based on the old Chrysler-designed Mini engine)

Both continue to have 16 valves, and have been adapted for flex fuels, running on ethanol or gasoline; the 1.6 generates 115-117 horsepower depending on fuel, while the 1.8 pumps out 130-132 horsepower. They are used in the Renegade, 500X, Bravo, Linea, Palio, Punto, Grand Siena, Strada, Idea, Doblò, and Ram 700. In the Ram 700, it is rated at 115 hp at 5,500 rpm, and 117 lb-ft of torque at 4,500 rpm; it has multiple port sequential fuel injection and a timing chain, rather than a belt.

A factory worker wrote:

The 1.8 liter Neon export engine was based on the Trenton-made 2.0; it was a smaller bore, with the same rods and crank as the 2.0 (it's easier to make different sized pistons than both rods and crank). The block line would change over the tooling for the smaller bore and run a few thousand per month, but you had to make sure there were no 1.8 blocks in the system - if you tried to bore out a 1.8 liter, rough-bored block to finish the 2.0 liter bore size, the tooling wouldn't take it. It happened a few times.
There was also a 1.4/1.6 liter engine developed with Rover and used in the first generation of the BMW Mini.

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