Pretty sure the trucks are fully rebuilt as well - not new. Don't forget these capital numbers include the cost of administration on the T's side, consultants, contingency, return-to-service testing and likely consider factors such as cost escalations over the course of a multi-year project.
Alstom's 2012 award was $114 for 74 coaches, or $1.5M per coach. This is still listed in the FY22 CIP with a total program cost of $130M, or $1.75M per coach.
When you consider its now 10 years later and things simply cost more, an overall program cost of $2M per coach seems in line with the previous contract.