[mtflight]

L26 4.9
Although an improved and enlarged version of the HT4100, it was never called HT4900 by Cadillac.
A larger version, the L26 4.9, debuted in 1991 at 4.9 L with a square 92 mm (3.6 in) bore and stroke. Despite the fact that it had similar output to Allante's 4.5 L port fuel injected V-8, the 4.9 L engine represented a significant upgrade for the remainder of the Cadillac lineup. Horsepower output was up 20 hp (15 kW) from the previous 1990 4.5L engine and torque was up by 30 lb·ft (41 N·m), to 200 hp (149 kW) and 275 lb·ft (373 N·m). Both the 4.9 and 4.5 port fuel injected engines required premium fuel. The 4.9 produces its maximum horsepower at 4100 rpm.
The 4.9 was used throughout the Cadillac line. It was phased out in favor of the newer Cadillac Northstar engine; production ended in 1995.

From http://en.wikipedia.org/wiki/Cadillac_V8_engine#L26_4.9