Talk:Toyota AR engine

Metric
Should the engine spec like its bore and stroke be stated in SI metric system?

(since 1. Toyota uses SI metric system in engineering;

2. the imperial system stated when converted back to SI system can have a slight variation like for 2AR engine: bore s/b 9.0cm not 8.99cm; stroke s/b 9.8cm not 9.79cm; for 1AR engine: stroke s/b 10.5cm;

3. it has to be accurate because in later years people may need accurate info to rebore their engine, or find the right size piston etc;

4. for consistency, I sampled a few other article about Toyota engines in Wiki, the bore and stroke are all stated in metric system.)

North wiki (talk) 04:04, 23 February 2009 (UTC)


 * The usual way is to use a template to convert between the more precisely known measurement to the other measurement. E.g. 80 mm gives "80 mm" with 2 decimal place accuracy. Stepho-wrs (talk) 06:09, 23 February 2009 (UTC)


 * Knowing that Toyota love using 0.1mm steps for bore and stroke, I tried different combinations until I found 90x98=2494cc and 90x105=2672cc to within 0.5cc. $$ V =\frac { \pi (\frac{1}{2} bore)^2 * stroke * cylinders} {1000} $$ (bore in mm, stroke in mm, giving displacement in cc). Then used undefined undefined to give back imperial measurement that agree with the original references. Stepho-wrs (talk) 04:18, 24 February 2009 (UTC)

Higher output for Highlander
The 1AR engine has a higher output for Highlander. Is it possible to present the info neatly in the table format?

North wiki (talk) 09:21, 23 February 2009 (UTC)

Picture of 2AR-FE engine
I have a picture of the 2AR-FE engine installed in a 2011 Camry. I took the picture, so I own it, and would like to have it posted in the 2AR-FE section. Apparently, I don't hold sufficient rights to upload a picture to Wikipedia. How can I get in touch with somebody to upload a picture and post it on the page?Jnjadcock (talk) 20:26, 15 September 2010 (UTC)

8AR-FTS?
According to some sources (http://news.drom.ru/Lexus-IS-NX-28136.html), Lexus NX and forthcoming Lexus IS turbocharged are equipped with 8AR-FTS engine (googling for "8AR-FTS" also yields references to toyota.co.jp sources -- e.g. http://newsroom.toyota.co.jp/en/detail/2039119).

So, 1. 8AR-FTS deserves mentioning. 2. A big fat question: what are other engines between 2AR and 8AR -- 3,4,5,6,7? 84.237.43.230 (talk) 03:27, 24 April 2014 (UTC)


 * Agreed, the article should be expanded. Since everyone is allowed to edit WP articles, you can have a go. Don't worry about mistakes, more experienced editors will clean it up.
 * Here's another reference for you: http://www.lexus-int.com/models/NX/
 * Toyota does like to do weird things with it's engine/vehicle codes. My guess is that the 3..7AR will never exist. But was released in China, so it might come from the same TianJin factory as the 8A engine.  Stepho  talk 07:14, 24 April 2014 (UTC)

Otto or Atkinson?
Does this engine in the Hybrid Crown use the Otto or the Atkinson cycle? — Preceding unsigned comment added by 202.7.50.124 (talk) 01:37, 21 September 2022 (UTC)


 * Which model Crown, which calendar year? If the engine code has an X (eg 2AR-FXE) in it then it is Atkinson cycle. Most Toyota hybrids use the Atkinson cycle.  Stepho  talk 08:15, 21 September 2022 (UTC)

Excessive oil consumption?
If there are Wp:RS about oil burning in this engine, it should be added. I found this YouTube video that indicates this may be a growing problem Park3r (talk) 11:19, 16 July 2023 (UTC)