JTS engine

JTS engine

Infobox Automobile engine

name=Alfa Romeo JTS engine
aka =
manufacturer=Alfa Romeo
type =DOHC 4-valve I4, 60° V6
predecessor=Alfa Romeo TwinSpark
Alfa Romeo V6 engine
successor =
bore =
stroke =
displacement =1859 cc
1970 cc
2198 cc
3195 cc
length =
diameter =
width =
height =
weight = convert|168|kg|lb|abbr=on (3.6 V6 High Feature engine)
block =aluminium alloy
(2.0 JTS cast-iron)
head =aluminium alloy
valvetrain =
supercharger =
turbocharger =
fuelsystem =
fueltype = Petrol
oilsystem =
coolingsystem = Watercooled
power = 118 kW (160 PS)-191 kW (260 PS)
specpower =
torque =
compression =
fuelcon =
specfuelcon =
oilcon =
The JTS engine (Jet Thrust Stoichiometric) is a gasoline direct injection engine produced by Alfa Romeo. It exists in two forms, straight-4 and V6, and was introduced into the Alfa lineup in 2002.Cite web|url=http://www.italiaspeed.com/news_2002_02.html|title=news 2002|accessdate=2007-10-24|work=italiaspeed.com]

Four cylinder


The JTS engine debuted in 2002 in the Alfa Romeo 156. The engine replaced the 2.0 Twin Spark, by replacing this system with direct injection, dubbed "Jet Thrust Stoichiometric". This improved power from 114 kW (155 PS) to 121 kW (165 PS), but more importantly, torque climbed from 187 Nm (137 ft.lbf) to 206 Nm (151 ft.lbf). In 2003, this engine was introduced to the GTV/Spider coupé and roadster.In spite of its benefits to power, torque and economy, the JTS was not used in the smaller 147 or the larger 166, and much less in other models from the Fiat Group.

*Displacement: 1970 cc
*Power: 121 kW (165 PS) @6400 rpm
*Torque: Auto Nm|206 @3250 rpm

*2002-2005 Alfa Romeo 156
*2003-2005 Alfa Romeo GTV
*2003-2005 Alfa Romeo Spider
*2004-present Alfa Romeo GT


It was only in 2005, with the arrival of the 159, that more variants of the JTS were produced. The 2.0 JTS gave way to a 1.9 L variant with 118 kW (160 PS) and a 2.2 L version with 136 kW (185 PS). The 1.9JTS and 2.2JTS form part of a new engine family and are completely different from the 2.0JTS. Both 1.9 L and 2.2 L have chain driven camshafts and variable valve timing on both inlet and exhaust camshafts. Both current 1.9 and 2.2 JTS engine blocks are supplied by GM to the Fiat group. Both models are mapped to either a 6 speed manual gearbox plus a reverse gear, or a Formula One inspired sequential gearbox also comprising of 6 gears and reverse.

*Displacement: 1859 cc
*Power: 118 kW (160 PS) @6500 rpm
*Torque: Auto Nm|190 @4500 rpm

*2005-present Alfa Romeo 159


With the arrival of 159 was also introduced 2.2 JTS, the engine block is sourced from GM (GM Family II L61).

*Displacement: 2198 cc
*Power: 136 kW (185 PS) @6500 rpm
*Torque: Auto Nm|230 @4500 rpm

*2005-present Alfa Romeo 159
*2005-present Alfa Romeo Brera
*2006-present Alfa Romeo Spider

Six cylinder


The JTS direct injection system was first used in a V6 engine in 2005 with the introduction of the Alfa 159 and Brera. This is not related to the Alfa Romeo V6 engine, but is instead a derivation of the GM High Feature engine, modified by Alfa and capable of generation 191 kW (260 PS), a number GM can only reach with the larger 3.6 L variant. Engine is equipped with cam-phasing (variable valve timing) on both inlet and exhaust side, thus the name "TwinPhaser", it has also chain driven camshafts. The 3.2 JTS engine has a convert|89|mm|in|abbr=on bore and a convert|85.6|mm|in|abbr=on stroke.

*Displacement: 3195 cc
*Power: 191 kW (260 PS) @6200 rpm
*Torque: Auto Nm|322 @3800 rpm

*2004 Alfa Romeo Visconti (concept car)
*2005-present Alfa Romeo 159
*2005-present Alfa Romeo Brera
*2006-present Alfa Romeo Spider


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