Left, new MacBook Pro. 4GB Ram, 160GB Hard Drive, 2.4Ghz Intel Core Duo 2. OS X 10.4.10.
Right, PowerBook 145B. The first computer I ever owned -- purchased in 1994. 4MB RAM, 80MB Hard Drive. Motorola 60830 25mhz (if I remember right). Mac OS System 7.1.1. Still works. I think it boots faster than the new one.
So, raw clock speed = 96-fold increase; RAM = 1024-fold increase; and storage = 2048-fold increase.