Porsche is bringing back the 911 Speedster some 16 years and three model generations after it last was featured in the German sports-car maker's lineup.

The car, pictured here ahead of a planned unveiling alongside the 911 Carrera GTS at the Paris motor show, is just the third 911 Speedster to be put into series production and follows tradition by being based on the existing cabriolet version of Porsche's iconic rear-engine sports car…