Alfa Romeo's own engine index consists of the letters AR and a code of five numbers.
The Fiat engine index consists of seven numbers separated by a single letter.
The 2.9-liter twin-turbo V6 Alfa Romeo 690T has been built in Italy since 2015 for the Quadrifoglio versions of the Giulia and Stelvio. It produces 510-540 hp and 600 Nm and became the basis for Maserati’s 3.0-liter Nettuno engine.
The 2.2-liter diesel Alfa Romeo JTDM has been produced by CNH Industrial since 2015 for the Giulia and Stelvio and later also for the Jeep Wrangler. It has an aluminum block and produces 136-210 hp; there is a cast-iron-block version for the Fiat Ducato.
The 3.2-liter V6 engine Alfa Romeo 939A000 was produced at GM factories from 2005 to 2010 and was installed on such popular models of the Italian concern as the Brera and the similar Spider. The motor is based on the GM LU1 block, but it has its own cylinder heads, plus Twin Phaser phase regulators.
The 2.0-liter V6 turbo engine Alfa Romeo AR34102 was produced in Arese from 1998 to 2002 and was installed in the executive model 166, which is very popular in the European market. A similar power unit was installed on the GTV coupe and Spider convertible under the AR16202 index.
The 2.5-liter V6 Alfa Romeo AR32405 engine was produced in Arese from 2000 to 2005 and was installed only on advanced modifications of the 156 model popular in the European market. Another similar power unit was installed on the 166 sedan under its own index AR36201.
The 2.5-liter V6 Alfa Romeo AR67301 engine was assembled at the Arese plant from 1992 to 1997 and was installed only on charged modifications of the very popular 155 model in the European market. The same power unit was installed on the 166 sedan, but under its own index AR66201.
The Alfa Romeo AR16105 3.0-liter V6 engine was assembled at the Arese plant from 1999 to 2003 and installed in the popular GTV sports coupe, as well as the similar Spider convertible. The same unit was installed on the model 166 under the index AR36101 or Lancia Thesis as 841A000.
The 2.0-liter Alfa Romeo 937A1000 or 156 2.0 JTS engine was produced from 2002 to 2010 and was installed on such popular models of the company as 156, GT, GTV and similar Spider. Such a unit is essentially a modification of the Twin Spark engine with direct fuel injection.
The 2.2-liter Alfa Romeo 939A5000 or 159 2.2 JTS engine was produced from 2005 to 2010 and was installed on a number of well-known models of the concern such as 159, Brera and the similar Spider. In fact, this power unit was a modification of the Opel Z22YH motor with phase regulators.
The 1.8-liter Alfa Romeo 939B1000 or 159 1.8 TBi engine was produced from 2009 to 2014 and was installed on such well-known concern models as 159, Brera and the similar Spider. On third-generation Lancia Delta hatchbacks, this powertrain is known as the 1.8 DI T-Jet 16V.
The 1.8-liter Alfa Romeo 960A1000 or 1.75 TBi engine was produced from 2013 to 2019 and was installed on charged modifications of the Giulietta model, which is quite popular in Europe. This power unit can be found under the hood of the Alfa Romeo 4C two-seater sports coupe.
The 1.6-liter Alfa Romeo AR32104 or 156 1.6 TS engine was produced from 2000 to 2010 and was installed on the two most popular concern models of its time under the indices 147 and 156. This engine did not have a VLIM intake geometry change system like the larger engines of the series.
The 1.8-liter Alfa Romeo AR32201 or 1.8 Twin Spark engine was assembled from 1997 to 2001 and installed on such well-known concern models as 145, 146, 156, GTV and the similar Spider. After updating to more modern Euro 3 environmental standards, the motor changed its index to AR32205.
The 2.0 liter Alfa Romeo AR32301 or 156 2.0 TS engine was produced from 1998 to 2001 and fitted to a range of popular models such as the 145, 146, 156, GTV, and Spider. This power unit, after being upgraded to Euro 3 environmental standards, turned into the AR32310 motor.
The 2.0-liter Alfa Romeo AR32310 or 2.0 Twin Spark engine was assembled from 2000 to 2010 and installed on the company’s popular models with an index of 147, 156, GTV and the similar Spider. This power unit was essentially a Euro 3 modification of the well-known AR32301 motor.
The 2.4-liter Alfa Romeo 839A6000 or Alfa Romeo 166 2.4 JTD engine was produced from 2000 to 2002 and was installed on popular concern models with indexes 156 and 166, as well as Lancia Lybra. This unit is equipped with a 10-valve SOHC cylinder head without hydraulic lifters.
The 1.9-liter Alfa Romeo 937A5000 or Alfa Romeo 156 1.9 JTD engine was produced from 2003 to 2010 and was installed on many popular concern models, such as Alfa Romeo 147, 156 and GT. Also, this diesel unit can be found under the hood of the second generation Fiat Stilo or Bravo.
