An affordable AV receiver is always a good option to consider, so Pioneer VSX-832 vs Onkyo TX-8140 comparison definitely makes sense.
A significant difference between the receivers in the number of channels, Pioneer VSX-832 has 5.1 versus 2.0 for Onkyo TX-8140. Regarding power, then VSX-832 has such a W/Ohm ratio - 80/8, 165/6 when TX-8140 has a power of 80/8, 110/6. The THD is the same and is 0.08%.
Characteristics of digital to analog converter (DAC) are different, AK4438 384 KHz/32-bit for VSX-832 and AK4458 384 KHz/32-bit for the TX-8140. None of the models support Bi-amping. Each of the AV receivers can transmit an audio signal directly to the amplifier and bypasses any DSP processing.
Both models have the ability to connect to the Internet via WI-FI. Rivals from our review have Bluetooth support. Spotify can be used on each receiver. The VSX-832 can work with the audio stream from Deezer, TIDAL, Pandora, TuneIn Radio, and the TX-8140 can receive a content from SiriusXM. Only the VSX-832 provides HDMI signal transmission in standby mode. The VSX-832 can scale the input HDMI signal, unlike the TX-8140. Dolby Vision technology found support only on the VSX-832. Only the VSX-832 supports HDMI Audio Return Channel (ARC). Unfortunately, HDMI eARC is not available on monitored devices. Of the two receivers in our comparison, HDMI CEC is present in only the VSX-832. The TX-8140 has a built-in phono stage for connecting a vinyl player. A voice control is not available. An ECO mode is not present in each of the AV receivers. Both VSX-832 and TX-8140 can be configured using the Setup assistant.
Only the VSX-832 has a Dolby Atmos multichannel audio format support. A surround technology DTS:X is supported only by the VSX-832.