Welcome What's New Fleet Maintenance About Horsepower Used Car Services
  Napa Autocare Green Garage Directions Awards
Horsepower Auto Care, Windham, Maine
About Horsepower Autocare Inc.
Horsepower Autocare Inc. can service your new car and perform scheduled maintenance. We use quality Napa or OE (original equipment) parts that won't void your warranty.

We offer local shuttle service to home or work while your vehicle is being repaired. We have two loaner cars, for our customers' use.  


You'll find us here to greet you daily. We do enjoy what we do best - Customer Service and Quality Auto Repairs.

Bonnie and Bob Merrill, Proprietors
Bonnie and Bob Merrill, proprietors


Bob Merrill w/ NAPA award

Bob Merrill has been working on vehicles for more than 40 years. He worked for Caterpillar Tractor company as a field service technician for 17 years before he and Bonnie opened Horsepower Barn in 1979. Bob is a Master ASE Technician with an L1 certification in Advanced Derivability.

Both Bonnie and Bob earned their AAM (Accredited Automotive Manager) degree's in 1996 from the Automotive Service Association Management Institute. In 2016 the Automotive Management Institute decided to have a Masters program. We were 2 out of 44 in the country to have enough credits to be in the first Accredited Master Automotive Manager graduation in California.




"Bob is very knowledgeable and willing to explain procedures." C.C., Windham

ASE Blue Seal of Excellence.

A Blue Seal of Excellence

Recognized Business

"We're Proud of Our Blue Seal Team"

Striving to be the best and committed to proving it. We are certified in each area of service that we offer.We have an elite group of automotive service professionals willing to go the extra mile for our customers satisfaction. We are 100% staffed with ASE Technicians.

Horsepower Autocare

These are some of the organizations that we are offiliated with:



AAA - Approved Auto Repair Facility                                           
Lake Region Automotive Industry Advisory
Windham Chamber of Commerce

 SMCC Advisory Board

Napa Autocare Program

  Horsepower Autocare


Horsepower Autocare

Look at this picture carefully. Here in Maine we have alot of "creature migration" in the fall for the winter. This rodent made a home in this air cleaner housing. The customer came roaring in with the throttle cable stuck open. The housing and above the housing was filled with matting & straw. Your vehicle needs to have a professional look under the hood at least once a year to try to detect this potential problem.

Percived Value

What is true value ?  Is it when something is the cheapest ?  Or is it what you get for your money ?  When it comes to the automotive industry here are some thoughts to consider:  In order for a repair shop to do things cheaper what are you as a customer giving up ?  There will always be someone that can do it cheaper.  Does the repair shop have experienced ASE certified professionals that are compensated properly or people just leaning on your car ?  Does the repair shop carry garage liability insurance in case something happens to YOUR VEHICLE. Do they keep up with todays technology ?   Do they attend training ?  Do they use the highest quality parts or just the cheapest parts they can buy ?  How long do they stand behind their repairs ? (Till they can't see your tail lights or for at least a year).  Do they offer above and beyond services like shuttle service, loaner cars, service reminders or courtesy checks ?

What is the value of value to YOU ?

For 40 years we at Horsepower Autocare have pledged to you our VALUED customer to provide QUALITY repairs at a VALUED price ALWAYS.

"Thank you for the excellent service. What a secure feeling it is for me. Women alone are such an easy target and I appreciate you very much." D.D. Windham


Our technicians are the best ! Bob & Stephen are Master ASE Technicians & George is a ASE Technician. They have the knowledge to take care of your vehicle. Experience counts - the job done right the first time.


Stephen Thompson lives in Portland with his wife Denise and children Emma, April, Katelyn & Joseph. He is a graduate from CMCC and had worked for an Independent Auto repair for 10 years before joining us in 2011. He has attended after market training and is a Master ASE Technician and L1 Advanced Engine Proformance Specialist

They have chosen this profession as a life's work not just drifting thru life.


George Clements is an asset to our team. He previously had a career with a Ford dealer in Southern, Maine and more recently an independent repair in Gray. He is working on his ASE re-certifications that he had previously had. He has been attending after market automotive training since joining us in September 2017. He and his wife, Mary live in Falmouth.



Welcome What's New Fleet Maintenance About Horsepower Used Car Services
  Napa Autocare Green Garage Directions Awards

Horsepower Autocare Inc.
44 Roosevelt Trail, Route 302
Windham, ME 04062
Email: bonnie@horsepowerautocare.com