2016 Lexus RX350 And 450h: Business Class Travel Published on September 10, 2015 in First Drives by Alain Morin Photo: Alain Morin An RX 350 has a 521-litre trunk (1,594 with the seatbacks down), while the RX 450h varies from 510 to 1,585 litres, because of the battery pack.