With this release there appears to be more differentiation between vehicles.  The official Land Rover page also breaks it down by vehicle.  I’ll try to do same, thanks for all who sent in their notes.

Pivi Pro 4.2.1_
OS Release 4.2.1_

2024 Range Rover Autobiography V8 (4.2.1_)

-Improvements to in-vehicle communication networks. 24MY Gateway Module (GWM)
-Audio quality improvements which resolves:
— Rear Traffic Alert may be inaudible in some instances.
— Sound may be played through the incorrect audio channel on Meridian Sound System, 24MY Audio Amplifier Module (AAM)
-Electric Power Inverter Converter Control Module ‘E’ (EPICE) Robustness improvements to the Electric Active Roll Control (EARC) system 24MY
-Charging Robustness improvements to charge compatibility and charging performance. 24MY Battery Charger Control Module (BCCM)
-Diagnostic improvements and imprfoved battery cooling, allowing better cabin thermal & battery cooling performance. Heating Ventilation Air Conditioning (HVAC) 24MY

PHEV only: Please note that for a short period of time, you may experience some disruption in the EV capabilities after the update has completed. Please disconnect the vehicle charger and ensure the battery has a minimum charge level of 25% before starting the update.

2024 Evoque P300e (4.2.1_)

-Charging Robustness improvements to charge compatibility and charging performance. 24MY Battery Charger Control Module (BCCM)
-Improvements to in-vehicle communication networks. 24MY Gateway Module (GWM)
-4-Cylinder petrol Diagnostic improvement. 24MY Powertrain Control Module (PCM)
-Improvement to invertor Diagnostics. 24MY Electric Power Inverter Converter Control Module B (EPIC B)

2023 Jaguar F-Pace SVR (4.2.1_)

-6-Cylinder diesel – Improvement to powertrain robustness, reducing the risk of cranking (starting engine) failing due to power mode changes during extended crank events.
-Improved protection of 12V battery hardware during long cranking events. 23MY Powertrain Control Module (PCM)
-Audio quality improvements which resolves:
— Rear Traffic Alert may be inaudible in some instances.
— Sound may be played through the incorrect audio channel on Meridian Sound System, 23MY Audio Amplifier Module (AAM)
-Charging robustness improvements to charge compatibility and charging performance. 23MY Battery Charger Control Module (BCCM)

2022 Jaguar I-Pace (4.2.1_)

Diagnostic improvements to Chassis control system. 21 MY Chassis Control Module (CHCM)

2023 Land Rover Defender 110 D250 (4.2.1)

-6-Cylinder diesel – Improvement to powertrain robustness, reducing the risk of cranking (starting engine) failing due to power mode changes during extended crank events.
-Improved protection of 12V battery hardware during long cranking events. 23MY Powertrain Control Module (PCM)
-Audio quality improvements which resolves:
— Rear Traffic Alert may be inaudible in some instances.
— Sound may be played through the incorrect audio channel on Meridian Sound System, 23MY Audio Amplifier Module (AAM)
-Charging robustness improvements to charge compatibility and charging performance. 23MY Battery Charger Control Module (BCCM)

2021 Evoque P300e (4.2.1)

-4-Cylinder diesel – Improvements to the Diesel exhaust fluid (DEF) delivery system. 21/22MY Powertrain Control Module (PCM)
-Charging Robustness improvements to charge compatibility and charging performance. 21/22MY Battery Charger Control Module (BCCM)
-Improvement to invertor Diagnostics. 21/22MY Electric Power Inverter Converter Control Module B (EPIC B)
-Improved electric propulsion reliability at very high State of charge conditions. 21/22MY Powertrain Control Module (PCM)
-Software update to improve Software over the air (SOTA) (software over the air) update reliability. 21/22MY Powertrain Control Module (PCM)

2023 Discovery Sport D165 Urban Edition (4.2.1_)

-Charging robustness improvements to charge compatibility and charging performance. 23MY Battery Charger Control Module (BCCM)
-Improvement to invertor Diagnostics. 23MY Electric Power Inverter Converter Control Module B (EPIC B)
-Improvement to Fuel Pump Driver Module diagnostics. 23MY Fuel Pump Driver Module (FPDM)

2020 Land Rover Defender P300 (4.2.1) – The Stig at PowerfulUK 

-6-Cylinder petrol – Enhancements to powertrain control to reduce the risk of hesitation and improved Oxygen sensor diagnostics. 20/21/22MY Powertrain Control Module (PCM).
-6-Cylinder diesel – Improvement to powertrain robustness, reducing the risk of cranking (starting engine) failing due to power mode changes during extended crank events. Improved protection of 12V battery hardware during long cranking events. 21/22MY Powertrain Control Module (PCM)
-Charging robustness improvements to charge compatibility and charging performance. 22MY Battery Charger Control Module (BCCM)