How can we find difference between bs3 and bs - 43970

How can we find difference between bs3 and bs4 engines

By Nafees Ahmad on Mar 30, 2017

royal infield bs3 he ya bs4
Answer by Sandy on Mar 30, 2017
duke 200 2015 model whether it is bs3 engine or bs4 engine
Answer by Sachin N on Mar 31, 2017
IF THERE IS ANY RENAULT PRODUCT BS3 VEHICLES ARE THERE

Answer by PRAVEEN V B on Apr 24, 2017
suzuki lets scooty 113 cc is BS III or BS IV
Answer by Jai on Jun 9, 2017