The Indian firm, Hero MotoCorp on its part hit back saying its fuel efficiency values were certified by iCAT (International Centre for Automotive Technology), a government authorised agency, and "challenging these test results" mean "questioning the standards and regulations established by the Government of India, and in turn, the law of the land in our country".
     
Questioning Hero's claims, Honda R&D Center India (HRID) President & CEO Keiji Kasa said: "We only want to say one thing; such claims are misleading and are far from reality. Since the base engine in question has been developed by Honda, we do understand its realistic assessment on performance and capabilities."
     
He further said: "The claimed mileage cannot be maintained on sustained basis even within a completely controlled environment."
     
Last month, Hero had said that iCAT had certified its Splendor iSmart model with a mileage of 102.50 kilometre per litre.
     
When contacted, a Hero MotoCorp spokesperson said through its in-house R&D capabilities, the company has been able to improve mileage by various techniques, including reducing kerb weight of vehicle, upgrading and optimising engines, adopting lean burn technology, and coupling them with the "Idle Start Stop System which switches off the engine in Idle and automatically starts the engine by pressing the clutch".
     
"All these improvements brought by Hero could improve the mileage phenomenally," the spokesperson added.
      
Honda, however, is unconvinced.       

"Idle stop start system has been introduced by Honda for over 15 years now. We are aware of its capability to enhance fuel efficiency and respect introduction of the similar technology in India," Kasa said, adding "the combination with this base engine and new idle stop start system may not enable the user to reach the claimed mileage in actual riding environment in India".
      
Refuting the assertion, the Hero MotoCorp spokesperson said: "While the mileage obtained by actual users may differ due to several variables such as driving habits, road and traffic conditions, fuel quality, maintenance practices and loading pattern etc, the customer would still benefit from much higher fuel efficiency as compared to other competing products."