Welcome to Grainger Motor Group Kia

With 6 sites across East Anglia - Mantles Group & EMG Motor Group

Founded in 2022 by brothers Harry and Neal Grainger, Grainger Motor Group is the UK’s fastest-growing dealer group.

GMG Kia consists of two highly respected automotive businesses: Mantles Group and EMG Motor Group. Together, the 6 Kia locations are spread across East Anglia includes Mantles Royston, EMG Cambridge, Ely, King's Lynn, South Cambridge, and Thetford.

Mantles Kia represents Grainger Motor Group across Hertfordshire. Mantles has been in business for over 100 years, building up a reputation for its professionalism, transparency, and customer-first approach – leading to customers who keep coming back.

EMG Motor Group Kia operates a large and established dealership network across the East Anglia, serving customers throughout Cambridgeshire, Bedfordshire, Suffolk, Norfolk, and beyond. With modern showrooms and expert local teams, EMG Motor Group has been providing customers with exceptional choice, knowledgeable advice, and a consistently high standard of service for over 50 years.

Our business is built on a simple but powerful commitment: to deliver an exceptional customer experience through knowledgeable, highly trained teams who care about our customers for life.

Whether you are searching for a new or used vehicle, we offer an extensive and diverse choice with a carefully selected stock of over 1,200 quality used vehicles, ensuring there is something to suit every lifestyle and budget.
Our commitment extends far beyond the point of sale. At Grainger Motor Group Kia, our expertly trained aftersales teams provide expert care throughout your ownership journey. From servicing and repairs to MOTs, all work is carried out by manufacturer-accredited technicians using the highest standards of workmanship.
Award-Winning Performance

At Grainger Motor Group, our ambition is simple: to set the benchmark for automotive retail in the UK. We are proud to operate some of the country’s leading dealerships, recognised not only by our customers but by the industry itself.

Our commitment to excellence has been reflected in multiple prestigious awards, including:
Kia Excellence Awards 2025

GMG claimed 5 of the 7 total awards at the Kia Excellence awards in 2025, including:

Dealer of the year
- 1st Place: EMG Motor Group Cambridge
- 2nd Place: Mantles Kia
- 3rd Place: EMG Motor Group Ely
Other Categories
- EV Dealer of the Year: EMG Motor Group Cambridge
- Aftersales Excellence Award: EMG Motor Group Ely
Kia Excellence Awards 2024

GMG claimed 6 of the 7 total awards at the Kia Excellence awards in 2024, including:

Dealer of the year
- 1st Place: Mantles Kia
- 2nd Place: EMG Motor Group Cambridge
- 3rd Place: EMG Motor Group Thetford
Mantles Kia also won
- EV Dealer of the Year
- Sales Excellence Award
- Customer Experience Award
AM Awards 2025 & 2026

The awards evening took place every May with the aim to set the benchmark for achievement across the motor retail sector. GMG have taken home 8 awards in the last two years, including:
- 2025 Dealer Group of the Year
- 2025 & 2026 Used Car Performance of the Year
- 2025 Franchised Dealership of the Year (Mantles Kia)
- 2025 & 2026 EV Performance of the Year (2025 Mantles Kia & 2026 EMG Kia Cambridge)
- 2025 Retailer of the Year (Special Award)
- 2026 Workshop of the Year (Mantles Kia)
Motor Trader Awards 2024 & 2025

Taking place at the Grosvenor House Hotel on London's iconic Park lane, the awards take place every November for a night of celebration, recognition and networking. Over the past two years, GMG have won:
- 2024 Customer Care Award - Mantles Kia
- 2024 Most Improved Dealership of the year – Mantles Kia
- 2025 Aftersales Excellence Award – Grainger Motor Group
- 2025 Franchised Dealership of the Year – Mantles KIA
- 2025 Most Improved Dealership of the Year – EMG KIA & Mazda Cambridge
- 2025 Used Car Dealer Group of the Year – Grainger Motor Group