Like the Aspire E5 14-inch, the Z40 offers an Intel Core i5 dual-core processor, Nvidia GeForce 820M graphics, and a 500GB mechanical hard drive. Even the displays, both of which measure 14 inches diagonally and offer 1366×768 resolution, are very similar.
On top of that, the price tags for these systems are almost identical. The Z40 is $589, while the Acer Aspire E5 14-inch costs $599.
Like most 14-inch systems, the Z40 offers a full-size keyboard, but omits a numpad. Unlike most laptops though, the Z40 still offers an extra row of keys. They include Home, End, Page Up, and Page Down. While potentially useful, the right side Backspace, Enter, and Shift keys are truncated to make room for them.
Low power draw translates directly to low heat output, a boon this Lenovo fully enjoys. We recorded an average external temperature of 85 degrees Fahrenheit at idle, and 96 degrees at load. The Z40 is several degrees cooler than the Acer Aspire E5 14-inch, and up to eight degrees cooler than the Dell Inspiron 15 7000 Series.