Exhibit 23.1

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We consent to the incorporation by reference of our report dated June 27, 2007 on the financial statements of the Group 1 Automotive, Inc. 401(k) Savings Plan (the Plan) included in this 2006 Annual Report on Form 11-K of the Plan into Group 1 Automotive, Inc.’s Registration Statement on Form S-8 (SEC File No. 333-80399) filed with the Securities and Exchange Commission.

/s/ Weinstein Spira & Company, P.C.  

Weinstein Spira & Company, P.C. 

Houston, Texas
June 29, 2007