As I learned the primary design difference between Buran and the USA Space Shuttles was that Buran rode a rocket to the orbit passively, while the Shuttles were firing their own engines, riding on huge passive fuel tanks, I didn't pay much attention as to what engines Buran had. "Just RCS" was the easy dismissal.
four jet engines for test flights, two outboard of the RCS (with afterburners) and two flanking the tailplane (without afterburners). Identical engines, different exhaust configuration. Only on the aerodynamics testbed OK-GLI. These enabled the testbed to take off under its own power, unlike the Shuttle testbed Enterprise which had to be carried to altitude on a Boeing 747 for each test flight.
the ODU as described in Pavel's answer.
The jet engines flanking the tail were initially intended to be used on the orbital Buran spaceplanes too, but were eventually deleted from the design.
The combined propulsion system (ODU) is one of the main onboard systems of the orbital ship (OK) and is intended for performing all dynamic operations in flight.
In the normal (accident-free) flight, the ODU engines stabilizes Buran in conjunction with the the rocket, executes the separation of the Buran and the rocket, and supports insertion to the orbit (two pulses), the stabilization and orientation of Buran, orbital maneuvering, approach and docking with other spacecraft, deceleration, descent from orbit and control descent.