Is the Celeron as powerful as a Pentium 133?

The Celeron line of Intel processors were a low cost "value" product designed for low end PCs. The earliest models were essentially Pentium II chips without a L2 memory cache. Later Celeron processors included more cache memory, but significantly less than the full fledged Pentium III and beyond. A Pentium 133MHz chip is a Pentium I and is definitely going to be slower than any Celeron processor.