Yes.
In Discovery terms, the old Disco1 has the 3.9 GEMS V8 with Lucas acilliaries, and the Disco2 instroduced in 1999 has the 4.0 V8 (still really a 3.9) with Bosch ancilliaries.
Not sure when these were introduced on the RR, but there certainly was an engine change which conincided with...