For now, the engine has been confirmed for the new NX SUV only, although the carmaker has said the new unit will make its way across a number of Lexus models.
This week, speaking with US mag Motor Trend on the sidelines of the Beijing show, Lexus executives reportedly confirmed that the IS sedan will be the new engine’s next destination.
Details of the plan have not been offered - or confirmed - but the question of where the turbo engine will sit in the IS range will depend on the future of the existing 2.5 litre engine.
With 175kW and 350Nm on tap, the new turbo engine easily outstrips the current IS 250’s 153kW/252Nm 2.5 litre engine.
And while the 2.0 litre engine’s fuel numbers have not been confirmed, it will very likely list better figures than the bigger unit’s 9.2 l/100km.
Where would the turbo engine enter? Would it replace the engine in the IS 250 model, or debut with an all-new badge?
This suggests we could see Lexus stick to the formula introduced with the new NX, debuting an IS 200t model.
But, while its higher output would make the IS 200t a mid-level model in the IS range, the name could lead buyers to assume it sits below the IS 250.
Could we then see the 250 cancelled - just as the original IS 200 badge was when the second-generation range arrived in 2005 - and replaced with the IS 200t?
We could also see Lexus move away from its traditional naming conventions by keeping the IS 250 as the entry model and reviving the IS 300 badge for the turbo model.
Whatever path Lexus takes, we can likely expect to know more toward the end of this year or early in 2015.