These modified Hyundai Elantra GT models were spotted testing in the US
These test mules are believed to be early testing mules for Hyundai's planned hybrid models
The convoy included several Toyota Prius and Prius+ models
Hyundai is understood to be using a parallel hybrid approach, rather than a plug-in setup
These engineering mules are still in the early stages of testing
These test mules are modified US market Elantra GTs
The Blue-Will concept was revealed at the Detroit motor show in 2010
Four different prototypes, each based on the US market Elantra GT were spied testing in the US this week alongside a convoy of Prius models.
The four Elantras all had different bodies, suggesting Hyundai is working out the most aerodynamic Prius-style shape for its upcoming hybrid. Both the standard five-seat Prius and the seven-seat Prius+ were part of the convoy, suggesting Hyundai will offer two differently-sized hybrid models.
There were no charging points on the cars, suggesting a parallel hybrid rather than a plug-in setup.
Hyundai first previewed its intention to take on the Prius with its 2010 Blue-Will concept. The Blue-Will concept was powered by a 1.6-litre direct-injection petol engine in conjunction with a 134bhp electric motor.
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