They were formally identified as Kevin Thomas Charles Byrne (48) and his wife Carol Louise Byrne (49), of Hazelmere Estate, Rhayader, Powys.
Mr Byrne was riding and his wife was pillion passenger when their black Yamaha V-Max motorcycle was involved in a head-on collision with a black Vauxhall Astra hatchback shortly before 12.20pm yesterday on the A458 at Rowton, Halfway House, between Shrewsbury and Welshpool.
Both were pronounced dead at the scene.
The couple were travelling towards Welshpool and the car in the opposite direction towards Shrewsbury. The male driver of the Vauxhall and two women passengers received minor injuries.
Police have renewed their appeal for witnesses.
The investigating officer, PC Richard Bramwell, said: “We are continuing to establish the circumstances which led up to this tragedy.
“I would appeal to anyone who witnessed the actual collision or who may have seen either vehicle immediately beforehand, to contact me at Shrewsbury police station on 101 or 0300 333 3000.
Post mortems will be carried out tomorrow and an inquest is likely to be opened later this week.