India’s electric vehicle manufacturers have emerged as the most energy-efficient in a new global assessment. According to the International Council on Clean Transportation’s 2025 evaluation, Tata Motors and Mahindra recorded the most energy-efficient battery-electric vehicle lineups among 22 major automakers, with Tesla and BYD ranking third and fourth.
Tata Motors and Mahindra Lead EV Efficiency Rankings
The International Council on Clean Transportation (ICCT) found that Tata Motors and Mahindra operate the most energy-efficient battery-electric vehicle portfolios among the automakers included in its 2025 assessment.
According to the report, Tata’s EV lineup averaged approximately 106 Wh/km, while Mahindra averaged about 113 Wh/km. Tesla and BYD followed in third and fourth place.
Smaller EVs Shape India’s Strategy
Electric vehicles from Tata Motors and Mahindra are generally designed as smaller, lighter crossovers aimed at India’s urban environments, shorter daily driving distances, and price-sensitive market.
The report notes that energy efficiency can be used in different ways. While Tesla has often used efficiency to maximize driving range from a battery, Tata and Mahindra may be using it to provide sufficient range with smaller battery packs, helping keep vehicles lighter and potentially more affordable.
ICCT Measures Overall Lineup Efficiency
The ICCT converts official test-cycle data into comparable energy-consumption figures and calculates an average across each manufacturer’s battery-electric vehicle lineup.
The assessment does not conclude that Tata Motors or Mahindra possess more advanced EV technology than Tesla. Instead, it evaluates the overall efficiency of each company’s vehicle portfolio, reflecting both product strategy and lineup composition.
Manufacturers focused on compact vehicles may benefit from an inherent advantage compared with brands that sell larger SUVs or high-performance models. Tata Motors and Mahindra primarily offer compact electric SUVs, while Tesla and BYD sell a broader range of larger, heavier, and more powerful vehicles.
Vehicle Design Still Plays a Critical Role
The report emphasizes that vehicle size alone does not determine efficiency. Factors including weight, aerodynamics, power electronics, battery management, and drivetrain calibration all influence how efficiently an electric vehicle uses energy.
According to the assessment, the results suggest that Tata Motors’ and Mahindra’s vehicles benefit not only from their compact dimensions but also from optimization for the markets they serve.
Efficiency Offers Another Path for EV Development
The ranking does not indicate that Tata Motors and Mahindra have surpassed Tesla or BYD across every aspect of electric vehicle development. However, it suggests that designing EVs around smaller battery packs can be a competitive advantage rather than a compromise.
Because battery packs remain among the most expensive components in an electric vehicle, reducing battery capacity where possible has the potential to lower both vehicle weight and production costs.
The ICCT assessment highlights that while the industry has long emphasized larger batteries, extended driving range, and quicker acceleration, improvements in energy efficiency may also play a significant role in future electric vehicle development.
