The two are completely interchangeable on the outside. The 2.1 has a larger
throttle plate and does not have the fitting for the distributor vacuum
retard. The earlier 1.9 also has two separate switches for closed and full
throttle.

Dennis

-----Original Message-----
From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf Of
David Beierl
Sent: Friday, December 10, 2010 2:20 PM
To: vanagon@GERRY.VANAGON.COM
Subject: 1.9l vs 2.1l throttle body?

What are the differences in dimensions please?  External diameter and bore
if possible.

Thanks,
David